A natural arch, natural bridge, or (less commonly) rock arch is a natural

landform A landform is a land feature on the solid surface of the Earth or other planetary body. They may be natural or may be anthropogenic (caused or influenced by human activity). Landforms together make up a given terrain, and their arrangement ...

where an

arch An arch is a curved vertical structure spanning an open space underneath it. Arches may support the load above them, or they may perform a purely decorative role. As a decorative element, the arch dates back to the 4th millennium BC, but stru ...

has formed with an opening underneath. Natural arches commonly form where inland

cliff In geography and geology, a cliff or rock face is an area of Rock (geology), rock which has a general angle defined by the vertical, or nearly vertical. Cliffs are formed by the processes of weathering and erosion, with the effect of gravity. ...

s, coastal cliffs,

fins A fin is a thin component or appendage attached to a larger body or structure. Fins typically function as foil (fluid mechanics), foils that produce lift (force), lift or thrust, or provide the ability to steer or stabilize motion while travelin ...

or stacks are subject to erosion from the sea, rivers or

weathering Weathering is the deterioration of rocks, soils and minerals (as well as wood and artificial materials) through contact with water, atmospheric gases, sunlight, and biological organisms. It occurs '' in situ'' (on-site, with little or no move ...

( subaerial processes). Most natural arches are formed from narrow fins and sea stacks composed of

sandstone Sandstone is a Clastic rock#Sedimentary clastic rocks, clastic sedimentary rock composed mainly of grain size, sand-sized (0.0625 to 2 mm) silicate mineral, silicate grains, Cementation (geology), cemented together by another mineral. Sand ...

limestone Limestone is a type of carbonate rock, carbonate sedimentary rock which is the main source of the material Lime (material), lime. It is composed mostly of the minerals calcite and aragonite, which are different Polymorphism (materials science) ...

with steep, often vertical, cliff faces. The formations become narrower due to

erosion Erosion is the action of surface processes (such as Surface runoff, water flow or wind) that removes soil, Rock (geology), rock, or dissolved material from one location on the Earth's crust#Crust, Earth's crust and then sediment transport, tran ...

over

geologic time scale The geologic time scale or geological time scale (GTS) is a representation of time based on the rock record of Earth. It is a system of chronological dating that uses chronostratigraphy (the process of relating strata to time) and geochro ...

s. The softer rock

stratum In geology and related fields, a stratum (: strata) is a layer of rock or sediment characterized by certain lithologic properties or attributes that distinguish it from adjacent layers from which it is separated by visible surfaces known as ...

erodes away creating

rock shelter A rock shelter (also rockhouse, crepuscular cave, bluff shelter, or abri) is a shallow cave-like opening at the base of a bluff or cliff. In contrast to solutional caves (karst), which are often many miles long or wide, rock shelters are alm ...

s, or alcoves, on opposite sides of the formation beneath the relatively harder stratum, or

caprock Caprock or cap rock is a hard, resistant, and impermeable layer of rock that overlies and protects a reservoir of softer organic material, similar to the crust on a pie where the crust (caprock) prevents leakage of the soft filling (softer materia ...

, above it. The alcoves erode further into the formation eventually meeting underneath the harder caprock layer, thus creating an arch. The erosional processes exploit weaknesses in the softer rock layers making cracks larger and removing material more quickly than the caprock; however, the caprock itself continues to erode after an arch has formed, which will ultimately lead to collapse. The choice between ''bridge'' and ''arch'' is somewhat arbitrary. The Natural Arch and Bridge Society identifies a bridge as a subtype of arch that is primarily water-formed. By contrast, the ''Dictionary of Geological Terms'' defines a natural bridge as a "natural arch that spans a valley of erosion." The largest natural arch on Earth, by a significant margin, is the Xianren Bridge in southern China, with a span of .

Coastline

On coasts two different types of arches can form depending on the geology. On discordant coastlines rock types run at 90° to the coast. Wave refraction concentrates the wave energy on the headland, and an arch forms when

cave Caves or caverns are natural voids under the Earth's Planetary surface, surface. Caves often form by the weathering of rock and often extend deep underground. Exogene caves are smaller openings that extend a relatively short distance undergrou ...

s break through the headland. Two examples of this type of arch are

London Bridge The name "London Bridge" refers to several historic crossings that have spanned the River Thames between the City of London and Southwark in central London since Roman Britain, Roman times. The current crossing, which opened to traffic in 197 ...

in Victoria, Australia, and Neill Island in the

Andaman Islands The Andaman Islands () are an archipelago, made up of 200 islands, in the northeastern Indian Ocean about southwest off the coasts of Myanmar's Ayeyarwady Region. Together with the Nicobar Islands to their south, the Andamans serve as a mari ...

, India. When these arches eventually collapse, they form stacks and stumps. On

concordant coastline In coastal geography, a concordant, longitudinal, or Pacific type coastline occurs where beds, or layers, of differing rock types are folded into ridges that run parallel to the coast. The outer hard rock (for example, granite) provides a pro ...

s rock types run parallel to the coastline, with weak rock such as

shale Shale is a fine-grained, clastic sedimentary rock formed from mud that is a mix of flakes of Clay mineral, clay minerals (hydrous aluminium phyllosilicates, e.g., Kaolinite, kaolin, aluminium, Al2Silicon, Si2Oxygen, O5(hydroxide, OH)4) and tiny f ...

protected by stronger rock such as

. The wave action along concordant coastlines breaks through the strong rock and then erodes the weak rock very quickly. Good examples of this type of arch are the Durdle Door and

Stair Hole Stair Hole is a small cove located just west of Lulworth Cove in Dorset, southern England. The Fold (geology), folded limestone stratum, strata known as the ''Lulworth crumple'' are particularly visible at Stair Hole. There are several caves vi ...

near Lulworth Cove on

Dorset Dorset ( ; Archaism, archaically: Dorsetshire , ) is a Ceremonial counties of England, ceremonial county in South West England. It is bordered by Somerset to the north-west, Wiltshire to the north and the north-east, Hampshire to the east, t ...

Jurassic Coast The Jurassic Coast, also known as the Dorset and East Devon Coast, is a World Heritage Site on the English Channel coast of southern England. It stretches from Exmouth in East Devon to Studland Bay in Dorset, a distance of about , and was ins ...

in south England. When Stair Hole eventually collapses it will form a

cove A cove is a small bay or coastal inlet. They usually have narrow, restricted entrances, are often circular or oval, and are often situated within a larger bay. Small, narrow, sheltered bays, inlets, creek (tidal), creeks, or recesses in a coast ...

Weather-eroded arches

Weather-eroded arches begin their formation as deep cracks which penetrate into a sandstone layer. Erosion occurring within the cracks wears away exposed rock layers and enlarges the surface cracks isolating narrow sandstone walls which are called fins. Alternating frosts and thawing cause crumbling and flaking of the porous sandstone and eventually cut through some of the fins. The resulting holes become enlarged to arch proportions by rockfalls and weathering. The arches eventually collapse leaving only buttresses that in time will erode. Many weather-eroded arches are found in

Arches National Park Arches National Park is a List of national parks of the United States, national park of the United States in eastern Utah. The park is adjacent to the Colorado River, north of Moab, Utah. The park contains more than 2,000 natural arch, natural ...

Canyonlands National Park Canyonlands National Park is a national park of the United States located in southeastern Utah near the town of Moab. The park preserves a colorful landscape eroded into numerous canyons, mesas, and buttes by the Colorado River, the Green Rive ...

, and

Grand Staircase–Escalante National Monument The Grand Staircase–Escalante National Monument (GSENM) is a United States national monument protecting the Grand Staircase, the Kaiparowits Plateau, and the Canyons of the Escalante (Escalante River) in southern Utah. It was established in 19 ...

(GSENM), all located in southern Utah, United States.

Water-eroded arches

Some natural bridges may look like arches, but they form in the path of streams that wear away and penetrate the rock. Pothole arches form by chemical weathering as water collects in natural depressions and eventually cuts through to the layer below. Natural Bridges National Monument in Utah protects the area surrounding three large natural bridges, all of which were formed by streams running through canyons, the largest of which is named

Sipapu Bridge Sipapu Bridge is a natural bridge or arch located in the Natural Bridges National Monument in central San Juan County, Utah Utah is a landlocked state in the Mountain states, Mountain West subregion of the Western United States. I ...

with a span of . The

Rainbow Bridge National Monument Rainbow Bridge is a natural arch in southern Utah, United States. With a span of , as reported in 1974 by the Bureau of Reclamation, and height of , it is one of the largest natural arches in the world. At the top it is thick and wide. The b ...

's namesake was also formed by flowing water which created the largest known natural bridge in the

Western Hemisphere The Western Hemisphere is the half of the planet Earth that lies west of the Prime Meridian (which crosses Greenwich, London, United Kingdom) and east of the 180th meridian.- The other half is called the Eastern Hemisphere. Geopolitically, ...

with a span of , based on a laser measurement made in 2007. Xianren Bridge, also known as Fairy Bridge, in

Guangxi Guangxi,; officially the Guangxi Zhuang Autonomous Region, is an Autonomous regions of China, autonomous region of the China, People's Republic of China, located in South China and bordering Vietnam (Hà Giang Province, Hà Giang, Cao Bằn ...

, China is currently the world's largest known natural bridge with a span recorded at by the ''Natural Arch and Bridge Society'' in October 2010, with a precision of ±.

Cave erosion

Natural bridges can form from natural

s, where paired

sinkhole A sinkhole is a depression or hole in the ground caused by some form of collapse of the surface layer. The term is sometimes used to refer to doline, enclosed depressions that are also known as shakeholes, and to openings where surface water ...

s collapse and a ridge of stone is left standing in between, with the cave passageway connecting from sinkhole to sinkhole. Like all rock formations, natural bridges are subject to continued erosion, and will eventually collapse and disappear. One example of this was the double-arched Victorian coastal rock formation,

, which lost an arch after storms increased erosion.

Moon Hill Moon Hill () is a hill with a natural arch through it a few kilometers outside Yangshuo in southern People's Republic of China, China's Guangxi autonomous region. Moon Hill is part of the Guilin Mountains. It is so named for a wide, semicircular ...

in Yangshuo,

Guizhou Province ) , image_skyline = , image_caption = , image_map = Guizhou in China (+all claims hatched).svg , mapsize = 275px , map_alt = Map showing the location of Guizhou Province , map_caption = Map s ...

, China, is an example of an arch formed by the remnant of a

karst Karst () is a topography formed from the dissolution of soluble carbonate rocks such as limestone and Dolomite (rock), dolomite. It is characterized by features like poljes above and drainage systems with sinkholes and caves underground. Ther ...

limestone cave.

Arches as highway or railway bridges

In a few places in the world, natural arches are utilized by humans as transportation bridges with highways or railroads running across them. In Virginia, US Route 11 traverses Natural Bridge. Two additional natural arch roadways are found in

Kentucky Kentucky (, ), officially the Commonwealth of Kentucky, is a landlocked U.S. state, state in the Southeastern United States, Southeastern region of the United States. It borders Illinois, Indiana, and Ohio to the north, West Virginia to the ...

. The first, a cave erosion arch made of limestone, is in

Carter Caves State Resort Park Carter Caves State Resort Park is located in Carter County, Kentucky, Carter County, Kentucky, United States, along Tygarts Creek. It is formed by Carter Caves, and nearby Cascade Caves, which were added to the park in 1959. On December 16, 1981 ...

and has a paved road on top. The second, a weather-eroded sandstone arch with a dirt road on top, is on the edge of Natural Bridge State Park in Kentucky. The latter arch is called White's Branch Arch (also known as the Narrows) and the road going over it is usually referred to as the Narrows Road. In Europe, the

Romania Romania is a country located at the crossroads of Central Europe, Central, Eastern Europe, Eastern and Southeast Europe. It borders Ukraine to the north and east, Hungary to the west, Serbia to the southwest, Bulgaria to the south, Moldova to ...

n village of Ponoarele has a road segment called God's Bridge that is long and wide, passing over a stone arch high and thick. The railroad from

Lima Lima ( ; ), founded in 1535 as the Ciudad de los Reyes (, Spanish for "City of Biblical Magi, Kings"), is the capital and largest city of Peru. It is located in the valleys of the Chillón River, Chillón, Rímac River, Rímac and Lurín Rive ...

Peru Peru, officially the Republic of Peru, is a country in western South America. It is bordered in the north by Ecuador and Colombia, in the east by Brazil, in the southeast by Bolivia, in the south by Chile, and in the south and west by the Pac ...

crosses the Rio Yauli on a natural bridge near kilometer 214.2 as it approaches the city of La Oroya.

Notable natural arches

Africa

* Aloba Arch,

Chad Chad, officially the Republic of Chad, is a landlocked country at the crossroads of North Africa, North and Central Africa. It is bordered by Libya to Chad–Libya border, the north, Sudan to Chad–Sudan border, the east, the Central Afric ...

* Acacus Tedrart Arch, Libya * Boatswain Bird Island,

Ascension Island Ascension Island is an isolated volcanic island, 7°56′ south of the Equator in the Atlantic Ocean, South Atlantic Ocean. It is about from the coast of Africa and from the coast of South America. It is governed as part of the British Overs ...

* Bogenfels,

Namibia Namibia, officially the Republic of Namibia, is a country on the west coast of Southern Africa. Its borders include the Atlantic Ocean to the west, Angola and Zambia to the north, Botswana to the east and South Africa to the south; in the no ...

* Goedehoop natural rock bridge,

South Africa South Africa, officially the Republic of South Africa (RSA), is the Southern Africa, southernmost country in Africa. Its Provinces of South Africa, nine provinces are bounded to the south by of coastline that stretches along the Atlantic O ...

Hole-in-the-Wall Hole-in-the-Wall is a remote pass in the Big Horn Mountains of Johnson County, Wyoming. In the late 19th and the early 20th centuries, the Hole-in-the-Wall Gang and Butch Cassidy's Wild Bunch gang met at the log cabin, which is now preserved ...

Eastern Cape The Eastern Cape ( ; ) is one of the nine provinces of South Africa. Its capital is Bhisho, and its largest city is Gqeberha (Port Elizabeth). Due to its climate and nineteenth-century towns, it is a common location for tourists. It is also kno ...

, South Africa *

Tassili n'Ajjer Tassili n'Ajjer (Berber: ''Tassili n Ajjer'', ; "Plateau of rivers") is a mountain range in the Sahara desert, located in south-eastern Algeria. It holds one of the most important groupings of prehistoric cave art in the world, and covers an ar ...

and Tadrart Rouge, two mountain ranges with many arches,

Algeria Algeria, officially the People's Democratic Republic of Algeria, is a country in the Maghreb region of North Africa. It is bordered to Algeria–Tunisia border, the northeast by Tunisia; to Algeria–Libya border, the east by Libya; to Alger ...

* Tukuyu natural bridge,

Tanzania Tanzania, officially the United Republic of Tanzania, is a country in East Africa within the African Great Lakes region. It is bordered by Uganda to the northwest; Kenya to the northeast; the Indian Ocean to the east; Mozambique and Malawi to t ...

* Wolfberg Arch,

Cederberg The Cederberg mountains are located near Clanwilliam, Western Cape, Clanwilliam, approximately 300 km north of Cape Town, South Africa at about . The mountain range is named after the endangered Clanwilliam cedar (''Widdringtonia cedarbe ...

Western Cape The Western Cape ( ; , ) is a provinces of South Africa, province of South Africa, situated on the south-western coast of the country. It is the List of South African provinces by area, fourth largest of the nine provinces with an area of , an ...

, South Africa

Antarctica

* The Kerguelen Arch, Christmas Harbour, the

Kerguelen Islands The Kerguelen Islands ( or ; in French commonly ' but officially ', ), also known as the Desolation Islands (' in French), are a group of islands in the subantarctic, sub-Antarctic region. They are among the Extremes on Earth#Remoteness, most i ...

(collapsed ca. 1910) * Scott Island in the

Antarctic The Antarctic (, ; commonly ) is the polar regions of Earth, polar region of Earth that surrounds the South Pole, lying within the Antarctic Circle. It is antipodes, diametrically opposite of the Arctic region around the North Pole. The Antar ...

has a natural arch

Asia

* Keshet Cave,

Galilee Galilee (; ; ; ) is a region located in northern Israel and southern Lebanon consisting of two parts: the Upper Galilee (, ; , ) and the Lower Galilee (, ; , ). ''Galilee'' encompasses the area north of the Mount Carmel-Mount Gilboa ridge and ...

Israel Israel, officially the State of Israel, is a country in West Asia. It Borders of Israel, shares borders with Lebanon to the north, Syria to the north-east, Jordan to the east, Egypt to the south-west, and the Mediterranean Sea to the west. Isr ...

* Burdah Bridge,

Wadi Rum Wadi Rum ( ''Wādī Ramm'', also ''Wādī al-Ramm''), known also as the Valley of the Moon ( ''Wādī al-Qamar''), is a valley cut into the sandstone and granite rock in southern Jordan, near the border with Saudi Arabia and about to the east of ...

Jordan Jordan, officially the Hashemite Kingdom of Jordan, is a country in the Southern Levant region of West Asia. Jordan is bordered by Syria to the north, Iraq to the east, Saudi Arabia to the south, and Israel and the occupied Palestinian ter ...

* Baatara gorge waterfall in Tannourine,

Lebanon Lebanon, officially the Republic of Lebanon, is a country in the Levant region of West Asia. Situated at the crossroads of the Mediterranean Basin and the Arabian Peninsula, it is bordered by Syria to the north and east, Israel to the south ...

has three natural bridges. * Engetsu Island, Shirahama, Wakayama,

Japan Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea ...

* Hawrah Natural Bridge, Neill Island,

, India * Hazarchishma Natural Bridge,

Bamyan Province Bamyan, also spelled Bamiyan, Bāmīān or Bāmyān (), is one of the thirty-four provinces of Afghanistan with the city of Bamyan as its center, located in central parts of Afghanistan. The terrain in Bamyan is mountainous or semi-mountainous ...

Afghanistan Afghanistan, officially the Islamic Emirate of Afghanistan, is a landlocked country located at the crossroads of Central Asia and South Asia. It is bordered by Pakistan to the Durand Line, east and south, Iran to the Afghanistan–Iran borde ...

* Jabal Umm Fruth Bridge, Jordan * Jebel Kharaz,

, Jordan * "Jisr al-Hajar" or the "Stone Bridge" in Mzaar Kfardebian, Lebanon * Elephant Trunk Hill,

Guilin Guilin (Standard Zhuang: ''Gveilinz''), postal map romanization, formerly romanization of Chinese, romanized as Kweilin, is a prefecture-level city in the northeast of China's Guangxi, Guangxi Zhuang Autonomous Region. It is situated on the we ...

province,

China China, officially the People's Republic of China (PRC), is a country in East Asia. With population of China, a population exceeding 1.4 billion, it is the list of countries by population (United Nations), second-most populous country after ...

province, China * Natural Arch, Tirumala hills,

Tirumala Tirumala is a Hindu religious temple town in Tirupati district of the Indian state of Andhra Pradesh. It is one of the neighbourhoods of the Tirupati city. The town is a part of Tirupati Urban Development Authority and located in Tirupat ...

India India, officially the Republic of India, is a country in South Asia. It is the List of countries and dependencies by area, seventh-largest country by area; the List of countries by population (United Nations), most populous country since ...

* Pasilagon Point Natural Arch, Banton,

Romblon Romblon (, , ), officially the Province of Romblon, is an archipelagic province of the Philippines located in the Mimaropa region. Its main components include Romblon, an archipelagic municipality of the same name that also serves as the provi ...

Philippines The Philippines, officially the Republic of the Philippines, is an Archipelagic state, archipelagic country in Southeast Asia. Located in the western Pacific Ocean, it consists of List of islands of the Philippines, 7,641 islands, with a tot ...

* The Pigeons' Rock known as

Raouché Raouché () is a residential and commercial neighborhood in Beirut, Lebanon. It is known for its upscale apartment buildings, numerous restaurants, and cliff-side cafés that line Avenue de Paris, which forms part of the Corniche Beirut. Off t ...

Beirut Beirut ( ; ) is the Capital city, capital and largest city of Lebanon. , Greater Beirut has a population of 2.5 million, just under half of Lebanon's population, which makes it the List of largest cities in the Levant region by populatio ...

, Lebanon * Punarjani Guha, natural tunnel in

Thrissur district Thrissur (), anglicised as Trichur, is one of the List of districts of Kerala, 14 districts in the States and union territories of India, Indian state of Kerala. It is situated in the central region of the state. Spanning an area of about , th ...

of Kerala, India * Rock Bridge of Gulanchwadi, Narayangaon,

Maharashtra Maharashtra () is a state in the western peninsular region of India occupying a substantial portion of the Deccan Plateau. It is bordered by the Arabian Sea to the west, the Indian states of Karnataka and Goa to the south, Telangana to th ...

, India * Shipton's Arch,

Xinjiang Xinjiang,; , SASM/GNC romanization, SASM/GNC: Chinese postal romanization, previously romanized as Sinkiang, officially the Xinjiang Uygur Autonomous Region (XUAR), is an Autonomous regions of China, autonomous region of the China, People' ...

, China * Steller's Arch on Bering Island, Russia *

Tianmen Mountain Tianmen Mountain () is a mountain located within Tianmen Mountain National Park, Zhangjiajie, in the northwestern part of Hunan Province, China. Mountain A cablecar was constructed in 2005 by the French company Poma from nearby Zhangjiajie rail ...

Zhangjiajie Zhangjiajie (; Tujia language, Tujia: /tsán tɕá kǎi/) is a prefecture-level city in the northwestern part of Hunan, Hunan Province, China. It comprises the district of Yongding District, Zhangjiajie, Yongding, Wulingyuan District, Wulingyua ...

, China * Xianren Bridge, China * The Great White Hole of Krabi, Krabi,

Thailand Thailand, officially the Kingdom of Thailand and historically known as Siam (the official name until 1939), is a country in Southeast Asia on the Mainland Southeast Asia, Indochinese Peninsula. With a population of almost 66 million, it spa ...

* Mountain Angel Eye,

Cao Bằng Cao Bằng () is a city in northern Vietnam. It is the capital and largest settlement of Cao Bằng Province. It is located on the bank of the Bằng Giang river, and is around away from the border with China's Guangxi region. According to the 2 ...

Vietnam Vietnam, officially the Socialist Republic of Vietnam (SRV), is a country at the eastern edge of mainland Southeast Asia, with an area of about and a population of over 100 million, making it the world's List of countries and depende ...

* The Great Arch, Hizma, Tabuk Province, Kingdom of Saudi Arabia

Europe

* Albandeira Arch, Lagoa, Algarve,

Portugal Portugal, officially the Portuguese Republic, is a country on the Iberian Peninsula in Southwestern Europe. Featuring Cabo da Roca, the westernmost point in continental Europe, Portugal borders Spain to its north and east, with which it share ...

* Arco Naturale,

Capri Capri ( , ; ) is an island located in the Tyrrhenian Sea off the Sorrento Peninsula, on the south side of the Gulf of Naples in the Campania region of Italy. A popular resort destination since the time of the Roman Republic, its natural beauty ...

Italy Italy, officially the Italian Republic, is a country in Southern Europe, Southern and Western Europe, Western Europe. It consists of Italian Peninsula, a peninsula that extends into the Mediterranean Sea, with the Alps on its northern land b ...

* As Catedrais beach, Ribadeo,

Spain Spain, or the Kingdom of Spain, is a country in Southern Europe, Southern and Western Europe with territories in North Africa. Featuring the Punta de Tarifa, southernmost point of continental Europe, it is the largest country in Southern Eur ...

Azure Window The Azure Window (), also known as the Dwejra Window (), was a natural arch on the island of Gozo, located just off the shores of Malta. The limestone feature, which was in Dwejra Bay close to the Inland Sea, Gozo, Inland Sea and Fungus Rock, ...

Gozo Gozo ( ), known in classical antiquity, antiquity as Gaulos, is an island in the Malta#The Maltese archipelago, Maltese archipelago in the Mediterranean Sea. The island is part of the Republic of Malta. After the Malta Island, island of Malta ...

Malta Malta, officially the Republic of Malta, is an island country in Southern Europe located in the Mediterranean Sea, between Sicily and North Africa. It consists of an archipelago south of Italy, east of Tunisia, and north of Libya. The two ...

(collapsed in 2017) * Blue Window or the Seal cave of the

Corinthian Gulf The Gulf of Corinth or the Corinthian Gulf (, ) is a deep inlet of the Ionian Sea, separating the Peloponnese from western mainland Greece. It is bounded in the east by the Isthmus of Corinth which includes the shipping-designed Corinth Canal and ...

, in the front of the Alcyonides islands,

Greece Greece, officially the Hellenic Republic, is a country in Southeast Europe. Located on the southern tip of the Balkan peninsula, it shares land borders with Albania to the northwest, North Macedonia and Bulgaria to the north, and Turkey to th ...

* Bow Fiddle Rock, Portknockie,

Scotland Scotland is a Countries of the United Kingdom, country that is part of the United Kingdom. It contains nearly one-third of the United Kingdom's land area, consisting of the northern part of the island of Great Britain and more than 790 adjac ...

* Capu Tafunatu,

France France, officially the French Republic, is a country located primarily in Western Europe. Overseas France, Its overseas regions and territories include French Guiana in South America, Saint Pierre and Miquelon in the Atlantic Ocean#North Atlan ...

* Chaos de Montpellier-le-Vieux, France * Devil's Gate (Crimea) * Dore Holm, Shetland Islands * Drangarnir, Faroe Islands * Durdle Door,

England England is a Countries of the United Kingdom, country that is part of the United Kingdom. It is located on the island of Great Britain, of which it covers about 62%, and List of islands of England, more than 100 smaller adjacent islands. It ...

* Dyrhólaey,

Iceland Iceland is a Nordic countries, Nordic island country between the Atlantic Ocean, North Atlantic and Arctic Oceans, on the Mid-Atlantic Ridge between North America and Europe. It is culturally and politically linked with Europe and is the regi ...

* Els Arcs, Castell de Castells, Spain * Es Pontàs, Spain *

Étretat Étretat () is a Communes of France, commune in the Seine-Maritime Departments of France, department in the Normandy (administrative region), Normandy Regions of France, region of Northwestern France. It is a Tourism, tourist and Agriculture, far ...

, France * Geropotamos bridge,

Crete Crete ( ; , Modern Greek, Modern: , Ancient Greek, Ancient: ) is the largest and most populous of the Greek islands, the List of islands by area, 88th largest island in the world and the List of islands in the Mediterranean#By area, fifth la ...

* Għar Qawqla,

(collapsed in the 20th century) * Green Bridge of Wales,

Pembrokeshire Pembrokeshire ( ; ) is a Principal areas of Wales, county in the South West Wales, south-west of Wales. It is bordered by Carmarthenshire to the east, Ceredigion to the northeast, and otherwise by the sea. Haverfordwest is the largest town and ...

Wales Wales ( ) is a Countries of the United Kingdom, country that is part of the United Kingdom. It is bordered by the Irish Sea to the north and west, England to the England–Wales border, east, the Bristol Channel to the south, and the Celtic ...

* Hajdučka vrata,

Čvrsnica Čvrsnica ( sr-cyrl, Чврсница, ) is a mountain in the Dinaric Alps, Dinarides of Bosnia and Herzegovina, located in northern Herzegovina. Most of the mountain is located in the Herzegovina-Neretva Canton municipalities of Mostar and Jabla ...

mountain,

Bosnia and Herzegovina Bosnia and Herzegovina, sometimes known as Bosnia-Herzegovina and informally as Bosnia, is a country in Southeast Europe. Situated on the Balkans, Balkan Peninsula, it borders Serbia to the east, Montenegro to the southeast, and Croatia to th ...

Inland Sea, Gozo The Inland Sea, sometimes called Qawra in Maltese and also known as Dwejra, is a lagoon of seawater on the island of Gozo linked to the Mediterranean Sea through an opening formed by a narrow natural arch. It was probably formed where a geologi ...

, Malta * Kuhstall,

Germany Germany, officially the Federal Republic of Germany, is a country in Central Europe. It lies between the Baltic Sea and the North Sea to the north and the Alps to the south. Its sixteen States of Germany, constituent states have a total popu ...

* Lalaria beach arch, Skiathos Island,

* Malá Pravčická brána,

Czech Republic The Czech Republic, also known as Czechia, and historically known as Bohemia, is a landlocked country in Central Europe. The country is bordered by Austria to the south, Germany to the west, Poland to the northeast, and Slovakia to the south ...

* Marinha Beach, Caramujeira, Lagoa, Algarve,

* Marsden Rock,

South Shields South Shields () is a coastal town in South Tyneside, Tyne and Wear, England; it is on the south bank of the mouth of the River Tyne. The town was once known in Roman Britain, Roman times as ''Arbeia'' and as ''Caer Urfa'' by the Early Middle Ag ...

(collapsed in 1996) * Marvelous Bridges,

Bulgaria Bulgaria, officially the Republic of Bulgaria, is a country in Southeast Europe. It is situated on the eastern portion of the Balkans directly south of the Danube river and west of the Black Sea. Bulgaria is bordered by Greece and Turkey t ...

Monte Forato Monte Forato is a mountain (1,230 m) in the Alpi Apuane, in Tuscany, central Italy Italy, officially the Italian Republic, is a country in Southern Europe, Southern and Western Europe, Western Europe. It consists of Italian Penins ...

Tuscany Tuscany ( ; ) is a Regions of Italy, region in central Italy with an area of about and a population of 3,660,834 inhabitants as of 2025. The capital city is Florence. Tuscany is known for its landscapes, history, artistic legacy, and its in ...

* Ófærufoss, Iceland (collapsed in winter 1992/1993) * Pistyll Rhaeadr, Wales * Ponoarele,

(Podul lui Dumnezeu, or God's Bridge) *

Pont d'Arc The Pont d'Arc (French language, French ''pont'' = bridge) is a large natural arch, natural bridge, located in the Ardèche ''departments of France, département'' in the south of France, 5 km from the town of Vallon-Pont-d'Arc. The arch, f ...

, France *

Pravčická brána The Pravčická brána (in English also ''Pravčice Gate'', ''Pravčická Gate'' or ''Pravcicka Gate''; ) is a narrow rock formation in Bohemian Switzerland in the Czech Republic, approx. 3 km northeast of Hřensko. With a span of 26.5 met ...

, Czech Republic * Puentedey, Spain (Puentedei, or God's Bridge) * Trypitòs Arch of

Paxi Paxos () is a Greek island in the Ionian Sea, lying just south of Corfu. As a group with the nearby island of Antipaxos and adjoining islets, it is also called by the plural form Paxi or Paxoi (, pronounced in English and in Greek). The main t ...

Island,

* Samar Natural Arch,

Serbia , image_flag = Flag of Serbia.svg , national_motto = , image_coat = Coat of arms of Serbia.svg , national_anthem = () , image_map = , map_caption = Location of Serbia (gree ...

* Šuplja Stena Natural Arch, Serbia * Tour Percée, France *

Wied il-Mielaħ Window The Wied il-Mielaħ Window () is a limestone natural arch on the north-western coast of the island of Gozo in Malta. It is located at the end of the valley Wied il-Mielaħ north of the village of Għarb. This natural arch is less well-known than ...

, Gozo, Malta * Vratna Gates, Serbia

North America

Canada

* Percé Rock,

Quebec Quebec is Canada's List of Canadian provinces and territories by area, largest province by area. Located in Central Canada, the province shares borders with the provinces of Ontario to the west, Newfoundland and Labrador to the northeast, ...

Caribbean

* Natural Bridge,

Aruba Aruba, officially the Country of Aruba, is a constituent island country within the Kingdom of the Netherlands, in the southern Caribbean Sea north of the Venezuelan peninsula of Paraguaná Peninsula, Paraguaná and northwest of Curaçao. In 19 ...

(collapsed in 2005)

Mexico

* El Arco de Cabo San Lucas,

Baja California Sur Baja California Sur, officially the Free and Sovereign State of Baja California Sur, is a state in Mexico. It is the 31st and last state to be admitted, in 1974. It is also the second least populated Mexican state and the ninth-largest state by ...

United States

* Anacapa Island, Channel Islands National Park,

California California () is a U.S. state, state in the Western United States that lies on the West Coast of the United States, Pacific Coast. It borders Oregon to the north, Nevada and Arizona to the east, and shares Mexico–United States border, an ...

* Angel Arch,

Utah Utah is a landlocked state in the Mountain states, Mountain West subregion of the Western United States. It is one of the Four Corners states, sharing a border with Arizona, Colorado, and New Mexico. It also borders Wyoming to the northea ...

* Arch Creek,

Florida Florida ( ; ) is a U.S. state, state in the Southeastern United States, Southeastern region of the United States. It borders the Gulf of Mexico to the west, Alabama to the northwest, Georgia (U.S. state), Georgia to the north, the Atlantic ...

* Arch Rock,

Michigan Michigan ( ) is a peninsular U.S. state, state in the Great Lakes region, Great Lakes region of the Upper Midwest, Upper Midwestern United States. It shares water and land boundaries with Minnesota to the northwest, Wisconsin to the west, ...

* Ayres Natural Bridge Park,

Wyoming Wyoming ( ) is a landlocked U.S. state, state in the Mountain states, Mountain West subregion of the Western United States, Western United States. It borders Montana to the north and northwest, South Dakota and Nebraska to the east, Idaho t ...

* Bell Smith Springs,

Illinois Illinois ( ) is a U.S. state, state in the Midwestern United States, Midwestern United States. It borders on Lake Michigan to its northeast, the Mississippi River to its west, and the Wabash River, Wabash and Ohio River, Ohio rivers to its ...

* Blackwater Natural Bridge, Wyoming *

Bryce Canyon National Park Bryce Canyon National Park () is a national park of the United States located in southwestern Utah. The major feature of the park is Bryce Canyon, which despite its name, is not a canyon, but a collection of giant natural amphitheaters along ...

* Corona Arch, Utah * Creelsboro Natural Bridge,

Delicate Arch Delicate Arch is a freestanding natural arch located in Arches National Park, near Moab in Grand County, Utah, United States. The arch is the most widely recognized landmark in Arches National Park and is depicted on Utah license plates an ...

, Utah * Devil's Doorway (Wisconsin) * Druid Arch, Utah * Eye of the Needle,

Montana Montana ( ) is a landlocked U.S. state, state in the Mountain states, Mountain West subregion of the Western United States. It is bordered by Idaho to the west, North Dakota to the east, South Dakota to the southeast, Wyoming to the south, an ...

* Goat Rock Beach, California * Grosvenor Arch, Utah * Holei Sea Arch,

Hawaii Volcanoes National Park Hawaii ( ; ) is an island U.S. state, state of the United States, in the Pacific Ocean about southwest of the U.S. mainland. One of the two Non-contiguous United States, non-contiguous U.S. states (along with Alaska), it is the only sta ...

Hawaii Hawaii ( ; ) is an island U.S. state, state of the United States, in the Pacific Ocean about southwest of the U.S. mainland. One of the two Non-contiguous United States, non-contiguous U.S. states (along with Alaska), it is the only sta ...

* Honopū Arch, Hawaii * Hickman Bridge, Utah * Koger Arch, Kentucky * Kolob Arch,

Zion National Park Zion National Park is a national park of the United States located in southwestern Utah near the town of Springdale. Located at the junction of the Colorado Plateau, Great Basin, and Mojave Desert regions, the park has a unique geography and a ...

, Utah * Landscape Arch, Utah * La Ventana Natural Arch, New Mexico * Mesa Arch, Utah * Mobius Arch,

* Natural Arch, Kentucky * Natural Bridge,

Virginia Virginia, officially the Commonwealth of Virginia, is a U.S. state, state in the Southeastern United States, Southeastern and Mid-Atlantic (United States), Mid-Atlantic regions of the United States between the East Coast of the United States ...

Natural Bridge Caverns The Natural Bridge Caverns are the largest commercial caverns in the US state of Texas. The name is derived from the natural limestone slab bridge that spans the amphitheater setting of the cavern's entrance. The span was left suspended when a ...

Texas Texas ( , ; or ) is the most populous U.S. state, state in the South Central United States, South Central region of the United States. It borders Louisiana to the east, Arkansas to the northeast, Oklahoma to the north, New Mexico to the we ...

*Natural Bridge of

Arkansas Arkansas ( ) is a landlocked state in the West South Central region of the Southern United States. It borders Missouri to the north, Tennessee and Mississippi to the east, Louisiana to the south, Texas to the southwest, and Oklahoma ...

* Natural Bridge Park,

Alabama Alabama ( ) is a U.S. state, state in the Southeastern United States, Southeastern and Deep South, Deep Southern regions of the United States. It borders Tennessee to the north, Georgia (U.S. state), Georgia to the east, Florida and the Gu ...

* Natural Bridge State Park, Kentucky * Natural Bridge State Park,

Massachusetts Massachusetts ( ; ), officially the Commonwealth of Massachusetts, is a U.S. state, state in the New England region of the Northeastern United States. It borders the Atlantic Ocean and the Gulf of Maine to its east, Connecticut and Rhode ...

* Natural Bridge State Park,

Wisconsin Wisconsin ( ) is a U.S. state, state in the Great Lakes region, Great Lakes region of the Upper Midwest of the United States. It borders Minnesota to the west, Iowa to the southwest, Illinois to the south, Lake Michigan to the east, Michig ...

* Natural Bridges National Monument, Utah * Natural Bridges State Beach, California *

, Utah * Rattlesnake Canyon,

Colorado Colorado is a U.S. state, state in the Western United States. It is one of the Mountain states, sharing the Four Corners region with Arizona, New Mexico, and Utah. It is also bordered by Wyoming to the north, Nebraska to the northeast, Kansas ...

* Rialto Beach,

Olympic National Park Olympic National Park is a national park of the United States located in Washington, on the Olympic Peninsula. The park has four regions: the Pacific coastline, alpine areas, the west-side temperate rainforest, and the forests of the drier e ...

, Washington * Rock Bridge Memorial State Park,

Missouri Missouri (''see #Etymology and pronunciation, pronunciation'') is a U.S. state, state in the Midwestern United States, Midwestern region of the United States. Ranking List of U.S. states and territories by area, 21st in land area, it border ...

Rockbridge State Nature Preserve Rockbridge State Nature Preserve is a nature reserve featuring a natural bridge located in the unincorporated area, unincorporated community of Rockbridge, Ohio, Rockbridge in Hocking County, Ohio, Hocking County, Ohio, United States. It is pa ...

Ohio Ohio ( ) is a U.S. state, state in the Midwestern United States, Midwestern region of the United States. It borders Lake Erie to the north, Pennsylvania to the east, West Virginia to the southeast, Kentucky to the southwest, Indiana to the ...

Sewanee Natural Bridge Sewanee Natural Bridge in Franklin County, Tennessee, is a high natural sandstone arch with a span of . It is essentially a giant sinkhole partially eroded to form a large stone bridge. A wet weather spring located behind the bridge in a rock c ...

Tennessee Tennessee (, ), officially the State of Tennessee, is a landlocked U.S. state, state in the Southeastern United States, Southeastern region of the United States. It borders Kentucky to the north, Virginia to the northeast, North Carolina t ...

, Utah * An arch at

Tettegouche State Park Tettegouche State Park ( ) is a Minnesota List of Minnesota state parks, state park on the North Shore (Lake Superior), north shore of Lake Superior northeast of Duluth, Minnesota, Duluth in Lake County, Minnesota, Lake County on scenic Minneso ...

Minnesota Minnesota ( ) is a U.S. state, state in the Upper Midwestern region of the United States. It is bordered by the Canadian provinces of Manitoba and Ontario to the north and east and by the U.S. states of Wisconsin to the east, Iowa to the so ...

, collapsed in 2010. * Three Arch Rocks National Wildlife Refuge,

Oregon Oregon ( , ) is a U.S. state, state in the Pacific Northwest region of the United States. It is a part of the Western U.S., with the Columbia River delineating much of Oregon's northern boundary with Washington (state), Washington, while t ...

* Tonto Natural Bridge,

Arizona Arizona is a U.S. state, state in the Southwestern United States, Southwestern region of the United States, sharing the Four Corners region of the western United States with Colorado, New Mexico, and Utah. It also borders Nevada to the nort ...

* Twin Arches, Big South Fork National River and Recreation Area, Tennessee"Big South Fork National River and Recreation Area: Twin Arches"
''nps.gov''. April 14, 2015. Retrieved March 14, 2018. *

Window Rock, Arizona Window Rock, known in Navajo language, Navajo as Tségháhoodzání (), is a city and census-designated place that serves as the capital of the Navajo Nation, the largest List of federally recognized tribes in the contiguous United States, Nativ ...

* Wrather Arch, Arizona * Yahoo Arch, Kentucky

Oceania

Australia

Port Campbell National Park The Port Campbell National Park is a national park in the south-western district of Victoria, Australia. The national park is situated approximately south-west of Melbourne and approximately east of Warrnambool. The park is located adjacen ...

, Victoria,

Australia Australia, officially the Commonwealth of Australia, is a country comprising mainland Australia, the mainland of the Australia (continent), Australian continent, the island of Tasmania and list of islands of Australia, numerous smaller isl ...

(one of the two spans collapsed in 1990) * Natural Bridge, Springbrook National Park,

Queensland Queensland ( , commonly abbreviated as Qld) is a States and territories of Australia, state in northeastern Australia, and is the second-largest and third-most populous state in Australia. It is bordered by the Northern Territory, South Austr ...

, Australia * Nature's Window, Kalbarri National Park.

Western Australia Western Australia (WA) is the westernmost state of Australia. It is bounded by the Indian Ocean to the north and west, the Southern Ocean to the south, the Northern Territory to the north-east, and South Australia to the south-east. Western Aust ...

New Zealand

* Mangapohue Natural Bridge,

New Zealand New Zealand () is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island () and the South Island ()—and List of islands of New Zealand, over 600 smaller islands. It is the List of isla ...

* Oparara Basin Arches, New Zealand * "The Hole in the Rock", Piercy Island, Cape Brett, New Zealand * Tunnel Beach arch,

Dunedin Dunedin ( ; ) is the second-most populous city in the South Island of New Zealand (after Christchurch), and the principal city of the Otago region. Its name comes from ("fort of Edin"), the Scottish Gaelic name for Edinburgh, the capital of S ...

, New Zealand * Spörings Arch,

Tolaga Bay Tolaga Bay () is both a bay and small town on the East Coast, New Zealand, East Coast of New Zealand's North Island located 45 kilometres northeast of Gisborne, New Zealand, Gisborne and 30 kilometres south of Tokomaru Bay. The region around th ...

, New Zealand * Mercury Bay, New Zealand (collapsed)

South America

* Arch Islands,

Falkland Islands The Falkland Islands (; ), commonly referred to as The Falklands, is an archipelago in the South Atlantic Ocean on the Patagonian Shelf. The principal islands are about east of South America's southern Patagonian coast and from Cape Dub ...

* Darwin's Arch,

Galápagos Islands The Galápagos Islands () are an archipelago of volcanic islands in the Eastern Pacific, located around the equator, west of the mainland of South America. They form the Galápagos Province of the Republic of Ecuador, with a population of sli ...

Ecuador Ecuador, officially the Republic of Ecuador, is a country in northwestern South America, bordered by Colombia on the north, Peru on the east and south, and the Pacific Ocean on the west. It also includes the Galápagos Province which contain ...

(collapsed in 2021) * Icononzo,

Colombia Colombia, officially the Republic of Colombia, is a country primarily located in South America with Insular region of Colombia, insular regions in North America. The Colombian mainland is bordered by the Caribbean Sea to the north, Venezuel ...

* La Portada,

Chile Chile, officially the Republic of Chile, is a country in western South America. It is the southernmost country in the world and the closest to Antarctica, stretching along a narrow strip of land between the Andes, Andes Mountains and the Paci ...

* Pedra Furada,

Ceará Ceará (, ) is one of the 26 states of Brazil, located in the Northeast Region, Brazil, northeastern part of the country, on the Atlantic Ocean, Atlantic coast. It is the List of Brazilian states by population, eighth-largest Brazilian State by ...

Brazil Brazil, officially the Federative Republic of Brazil, is the largest country in South America. It is the world's List of countries and dependencies by area, fifth-largest country by area and the List of countries and dependencies by population ...

* Pedra Furada,

Piauí Piauí ( ) is one of the states of Brazil, located in the country's Northeast Region, Brazil, Northeast Region. The state has 1.6% of the Brazilian population and produces 0.7% of the Brazilian GDP. Piauí has the shortest coastline of any coas ...

* Pedra Furada, Santa Catarina,

Puente del Inca Puente, a word meaning ''bridge A bridge is a structure built to Span (engineering), span a physical obstacle (such as a body of water, valley, road, or railway) without blocking the path underneath. It is constructed for the purpose of providin ...

Argentina Argentina, officially the Argentine Republic, is a country in the southern half of South America. It covers an area of , making it the List of South American countries by area, second-largest country in South America after Brazil, the fourt ...

* Sete Cidades National Park,

* San Rafael Falls,

(formed in 2020, collapsed in 2021) * La Catedral, Paracas National Reserve,

(Collapsed in 2007)

References

External links

The Natural Arch and Bridge Society
*
World map of many natural arches
{{Coastal geography Coastal and oceanic landforms Coastal geography Erosion landforms