The Borra Caves ''(Borrā Guhalu)'' are located on the East Coast of India, in the Ananthagiri hills of the

Araku Valley Araku Valley is a hill station in the Alluri Sitharama Raju district of Andhra Pradesh, India, located 111 km from Visakhapatnam. Geography Araku is located in the Eastern Ghats about from Visakhapatnam, close to the Odisha state border. The ...

(with hill ranges' elevation varying from ) of the

Alluri Sitharama Raju district Alluri Sitharama Raju district, also known as Alluri district and by its initials as ASR district, is a district in the Indian state of Andhra Pradesh. The headquarters of the district is located at Paderu. Named after Alluri Sitarama Raju, a r ...

Andhra Pradesh Andhra Pradesh (ISO 15919, ISO: , , AP) is a States and union territories of India, state on the East Coast of India, east coast of southern India. It is the List of states and union territories of India by area, seventh-largest state and th ...

. The caves, one of the largest in the country, at an elevation of about , distinctly exhibit a variety of

speleothems A speleothem (; ) is a geological formation made by mineral deposits that accumulate over time in natural caves. Speleothems most commonly form in calcareous caves due to carbonate dissolution reactions. They can take a variety of forms, depend ...

ranging in size and irregularly shaped

stalactites A stalactite (, ; , ) is a mineral formation that hangs from the ceiling of caves, hot springs, or man-made structures such as bridges and mines. Any material that is soluble and that can be deposited as a colloid, or is in suspension, or is ca ...

and

stalagmites A stalagmite (, ; ; ) is a type of rock formation that rises from the floor of a cave due to the accumulation of material deposited on the floor from ceiling drippings. Stalagmites are typically composed of calcium carbonate, but may consist o ...

. The caves are basically

karstic Karst () is a topography formed from the dissolution of soluble carbonate rocks such as limestone and dolomite. It is characterized by features like poljes above and drainage systems with sinkholes and caves underground. There is some eviden ...

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) ...

structures extending to a depth of , and are considered the deepest caves in India. :File:Borra Caves Info board.JPG The native name for the caves is ''Borrā Guhalu'' where ''Borra'' means abdomen in and ''Guhalu'' means caves in

Telugu language Telugu (; , ) is a Dravidian languages, Dravidian language native to the Indian states of Andhra Pradesh and Telangana, where it is also the official language. Spoken by about 96 million people (2022), Telugu is the most widely spoken member of ...

Etymology

Borra is Telugu word in native North Andhra dialect which means hole('Boriya' in standard Telugu).

Legend

On the discovery of the caves, there are several legends, which the tribals (Jatapu, Porja, Kondadora, Nookadora, valmiki etc.) who inhabit the villages around the caves narrate. The popular legend is that a cow, grazing on the top of the caves, dropped through a hole in the roof. The cowherd while searching for the cow came across the caves. He found a stone inside the cave that resembled a

Lingam A lingam ( , lit. "sign, symbol or mark"), sometimes referred to as linga or Shiva linga, is an abstract or Aniconism, aniconic representation of the Hinduism, Hindu Hindu deities, god Shiva in Shaivism. The word ''lingam'' is found in the Up ...

, which he interpreted as the Lord

Shiva Shiva (; , ), also known as Mahadeva (; , , Help:IPA/Sanskrit, ɐɦaːd̪eːʋɐh and Hara, is one of the Hindu deities, principal deities of Hinduism. He is the God in Hinduism, Supreme Being in Shaivism, one of the major traditions w ...

who protected the cow. The village folk who heard the story believed it and since then they have built a small temple for Lord Shiva outside the cave. People flock to the temple for worship and the cave to get a glimpse of the Lingam. Borra Caves Lingam

Another lyrical legend is that the

representing the

Hindu Hindus (; ; also known as Sanātanīs) are people who religiously adhere to Hinduism, also known by its endonym Sanātana Dharma. Jeffery D. Long (2007), A Vision for Hinduism, IB Tauris, , pp. 35–37 Historically, the term has also be ...

God Lord

, is found deep in the caves and above which is a stone formation of a cow (

Sanskrit Sanskrit (; stem form ; nominal singular , ,) is a classical language belonging to the Indo-Aryan languages, Indo-Aryan branch of the Indo-European languages. It arose in northwest South Asia after its predecessor languages had Trans-cultural ...

Kamadhenu Kamadhenu (, , ), also known as Surabhi (, or , ), is a divine bovine-goddess described in Hinduism as the mother of all cows. She is a miraculous cow of plenty who provides her owner whatever they desire and is often portrayed as the mother o ...

). It is surmised that the udder of this cow is the source of the Gosthani (Sanskrit: Cow's udder) River which originates from here, flows through

Vizianagram Vizianagaram, also known as Vijayanagaram, is a city and the headquarters of the Vizianagaram district in the Indian state of Andhra Pradesh. It is located in the Eastern Ghats, about west of the Bay of Bengal and north-northeast of Visakhapa ...

and

Visakhapatnam Visakhapatnam (; List of renamed places in India, formerly known as Vizagapatam, and also referred to as Vizag, Visakha, and Waltair) is the largest and most populous metropolitan city in the States and union territories of India, Indian stat ...

districts before emptying into the

Bay of Bengal The Bay of Bengal is the northeastern part of the Indian Ocean. Geographically it is positioned between the Indian subcontinent and the Mainland Southeast Asia, Indochinese peninsula, located below the Bengal region. Many South Asian and Southe ...

near

Bheemunipatnam Bheemunipatnam (also known as Bheemili) is a suburb of Visakhapatnam, India. The town was named after Bhima, a character in the Hindu epic Mahabharata. It was formerly administered under the Bheemunipatnam municipality but merged into GVMC in 20 ...

Valley Borracaves Eastern Ghats Visakhapatnam

Geography and climate

The caves are located in the

of the Ananthagiri hill range and is drained by the

Gosthani River The Gosthani river is a river in India. It rises in the Ananthagiri Hills of the Eastern Ghats and flows through the Borra Caves which lie near its source. It is the largest river flowing through Visakhapatnam city. It flows for 120 km ...

. At the entry, the cave measures up to horizontally and vertically. Stalagmite and stalactite formations are found in the caves. The average annual

temperature Temperature is a physical quantity that quantitatively expresses the attribute of hotness or coldness. Temperature is measurement, measured with a thermometer. It reflects the average kinetic energy of the vibrating and colliding atoms making ...

of Araku hills, where the caves are situated, is about . The average annual

rainfall Rain is a form of precipitation where water droplets that have condensed from atmospheric water vapor fall under gravity. Rain is a major component of the water cycle and is responsible for depositing most of the fresh water on the Earth. ...

reported is (mostly occurring during the northeast

monsoon A monsoon () is traditionally a seasonal reversing wind accompanied by corresponding changes in precipitation but is now used to describe seasonal changes in Atmosphere of Earth, atmospheric circulation and precipitation associated with annu ...

). The Gosthani river provides water supply to the

city.

Geology

The regional geology in the

Eastern Ghats The Eastern Ghats is a mountain range that stretches along the East Coast of India, eastern coast of the Indian peninsula. Covering an area of , it traverses the states and union territories of India, states of Odisha, Telangana, Andhra Prade ...

mobile belt, where the caves are located, is represented by the

khondalite Khondalite is a foliated metamorphic rock. In India, it is also called ''Bezwada Gneiss'' and ''Kailasa Gneiss''. It was named after the Khond tribe of Odisha and Andhra Pradesh because well-formed examples of the rock were found in the inha ...

suite of rocks (garnetiferous

sillimanite Sillimanite or fibrolite is an aluminosilicate mineral with the chemical formula Al2SiO5. Sillimanite is named after the American chemist Benjamin Silliman (1779–1864). It was first described in 1824 for an occurrence in Chester, Connecticut ...

gneisses Gneiss (pronounced ) is a common and widely distributed type of metamorphic rock. It is formed by high-temperature and high-pressure metamorphic processes acting on formations composed of igneous or sedimentary rocks. This rock is formed under p ...

quartz Quartz is a hard, crystalline mineral composed of silica (silicon dioxide). The Atom, atoms are linked in a continuous framework of SiO4 silicon–oxygen Tetrahedral molecular geometry, tetrahedra, with each oxygen being shared between two tet ...

o-feldsphatic

garnet Garnets () are a group of silicate minerals that have been used since the Bronze Age as gemstones and abrasives. Garnet minerals, while sharing similar physical and crystallographic properties, exhibit a wide range of chemical compositions, de ...

) of Archaen age. Quaternary deposits consist of

red bed Red beds (or redbeds) are sedimentary rocks, typically consisting of sandstone, siltstone, and shale, that are predominantly red in color due to the presence of ferric oxides. Frequently, these red-colored sedimentary strata locally contain t ...

sediments Sediment is a solid material that is transported to a new location where it is deposited. It occurs naturally and, through the processes of weathering and erosion, is broken down and subsequently sediment transport, transported by the action of ...

laterite Laterite is a soil type rich in iron and aluminium and is commonly considered to have formed in hot and wet tropical areas. Nearly all laterites are of rusty-red coloration, because of high iron oxide content. They develop by intensive and prolo ...

s, pediment fans,

colluvium Colluvium (also colluvial material or colluvial soil) is a general name for loose, unconsolidated sediments that have been deposited at the base of hillslopes by either rainwash, Sheet erosion , sheetwash, slow continuous downslope creep, or a va ...

alluvium Alluvium (, ) is loose clay, silt, sand, or gravel that has been deposited by running water in a stream bed, on a floodplain, in an alluvial fan or beach, or in similar settings. Alluvium is also sometimes called alluvial deposit. Alluvium is ...

and

coastal A coast (coastline, shoreline, seashore) is the land next to the sea or the line that forms the boundary between the land and the ocean or a lake. Coasts are influenced by the topography of the surrounding landscape and by aquatic erosion, su ...

sand Sand is a granular material composed of finely divided mineral particles. Sand has various compositions but is usually defined by its grain size. Sand grains are smaller than gravel and coarser than silt. Sand can also refer to a textural ...

s. The caves in the reserved forest area basically host a variety of

of various sizes and irregularly shaped stalactites and stalagmites. The

carbonate rock Carbonate rocks are a class of sedimentary rocks composed primarily of carbonate minerals. The two major types are limestone, which is composed of calcite or aragonite (different crystal forms of CaCO3), and Dolomite (rock), dolomite rock (also kn ...

s are pure white, and coarsely

crystalline A crystal or crystalline solid is a solid material whose constituents (such as atoms, molecules, or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions. In addition, macrosc ...

and the deformed and banded

marble Marble is a metamorphic rock consisting of carbonate minerals (most commonly calcite (CaCO3) or Dolomite (mineral), dolomite (CaMg(CO3)2) that have recrystallized under the influence of heat and pressure. It has a crystalline texture, and is ty ...

s cover a triangular area of ; surrounded by

diopside Diopside is a monoclinic pyroxene mineral with composition . It forms complete solid solution series with hedenbergite () and augite, and partial solid solutions with orthopyroxene and pigeonite. It forms variably colored, but typically dull ...

–

scapolite The scapolites (, "rod", and , "stone") are a group of rock-forming silicate minerals composed of aluminium, calcium, and sodium silicate with chlorine, carbonate and sulfate. The two endmembers are meionite () and marialite (). Silvialite i ...

–

feldspar Feldspar ( ; sometimes spelled felspar) is a group of rock-forming aluminium tectosilicate minerals, also containing other cations such as sodium, calcium, potassium, or barium. The most common members of the feldspar group are the ''plagiocl ...

calc-granulites. The

pyroxenite Pyroxenite is an ultramafic igneous rock consisting essentially of minerals of the pyroxene group, such as augite, diopside, hypersthene, bronzite or enstatite. Pyroxenites are classified into clinopyroxenites, orthopyroxenites, and the w ...

outcrops are dark and massive and include discontinuous calc-silicate bands, some of brown

mica Micas ( ) are a group of silicate minerals whose outstanding physical characteristic is that individual mica crystals can easily be split into fragile elastic plates. This characteristic is described as ''perfect basal cleavage''. Mica is co ...

and others with

calcite Calcite is a Carbonate minerals, carbonate mineral and the most stable Polymorphism (materials science), polymorph of calcium carbonate (CaCO3). It is a very common mineral, particularly as a component of limestone. Calcite defines hardness 3 on ...

Formation

The

, which originates from these caves and flows between the solidified stalactites and stalagmites in the karstic limestones formation, is the cause for the development of the odd shapes of structures. Water percolating from the roof of the caves dissolve

and trickle drop by drop to form

stalactite A stalactite (, ; , ) is a mineral formation that hangs from the ceiling of caves, hot springs, or man-made structures such as bridges and mines. Any material that is soluble and that can be deposited as a colloid, or is in suspension (chemistry ...

s at the roof of the cave and then dripping down to the ground form

stalagmite A stalagmite (, ; ; ) is a type of rock formation that rises from the floor of a cave due to the accumulation of material deposited on the floor from ceiling drippings. Stalagmites are typically composed of calcium carbonate, but may consist ...

s. These deposits have developed into interesting forms and structures inside the caves such as Shiva–Parvati, Mother–Child, Rishi's beard, human brain, mushrooms, crocodile, temple, etc. These shapes have captured the imagination of tourists, while some have been given religious interpretations.

Formations in the caves

The caves are deep and totally

aphotic The aphotic zone (aphotic from Greek prefix + "without light") is the portion of a lake or ocean where there is little or no sunlight. It is formally defined as the depths beyond which less than 1 percent of sunlight penetrates. Above the aphot ...

. There is an area in the caves with limited light penetration. The stalactites seen in the caves are about in length while the stalagmites are long and columns are in height and in width. The height of the cave is and the length is about . The average temperature of the inner cave wall is reported to be about .

Sulfur Sulfur ( American spelling and the preferred IUPAC name) or sulphur ( Commonwealth spelling) is a chemical element; it has symbol S and atomic number 16. It is abundant, multivalent and nonmetallic. Under normal conditions, sulfur atoms ...

springs discharge into the cave passages causing

corrosion Corrosion is a natural process that converts a refined metal into a more chemically stable oxide. It is the gradual deterioration of materials (usually a metal) by chemical or electrochemical reaction with their environment. Corrosion engine ...

of limestone. The spring waters display floating

mucus Mucus (, ) is a slippery aqueous secretion produced by, and covering, mucous membranes. It is typically produced from cells found in mucous glands, although it may also originate from mixed glands, which contain both Serous fluid, serous and muc ...

-like

biofilms A biofilm is a syntrophic community of microorganisms in which cells stick to each other and often also to a surface. These adherent cells become embedded within a slimy extracellular matrix that is composed of extracellular polymer ...

. These are thick orange microbial mats ( thick) with patches of yellow biofilms extending from the aphotic deep cave orifice. While the caves are basically limestone formations, the area surrounding these are of

formations which are prospected for precious stones like rubies.

Archeological Archaeology or archeology is the study of human activity through the recovery and analysis of material culture. The archaeological record consists of artifacts, architecture, biofacts or ecofacts, sites, and cultural landscapes. Archaeology ...

artifacts (

Paleolithic The Paleolithic or Palaeolithic ( years ago) ( ), also called the Old Stone Age (), is a period in human prehistory that is distinguished by the original development of stone tools, and which represents almost the entire period of human prehist ...

implements) have been found in the caves. The excavations carried out in the caves by the archeologists of the Andhra University, have unearthed stone tools of

Middle Paleolithic The Middle Paleolithic (or Middle Palaeolithic) is the second subdivision of the Paleolithic or Old Stone Age as it is understood in Europe, Africa and Asia. The term Middle Stone Age is used as an equivalent or a synonym for the Middle P ...

culture dating back 30,000 to 50,000 years, which confirm human habitation.

Genesis

Speleothem A speleothem (; ) is a geological formation made by mineral deposits that accumulate over time in natural caves. Speleothems most commonly form in calcareous caves due to carbonate dissolution reactions. They can take a variety of forms, depen ...

carbonates A carbonate is a salt of carbonic acid, (), characterized by the presence of the carbonate ion, a polyatomic ion with the formula . The word "carbonate" may also refer to a carbonate ester, an organic compound containing the carbonate group . ...

found in the caves have been subject to scientific studies. In fluviatile, spring, cave and soil environments microbial carbonates are important. In the biofilms and/or microbial mats, which are formed in the caves, the principal organisms associated are

bacteria Bacteria (; : bacterium) are ubiquitous, mostly free-living organisms often consisting of one Cell (biology), biological cell. They constitute a large domain (biology), domain of Prokaryote, prokaryotic microorganisms. Typically a few micr ...

, particularly

cyanobacteria Cyanobacteria ( ) are a group of autotrophic gram-negative bacteria that can obtain biological energy via oxygenic photosynthesis. The name "cyanobacteria" () refers to their bluish green (cyan) color, which forms the basis of cyanobacteri ...

, small

algae Algae ( , ; : alga ) is an informal term for any organisms of a large and diverse group of photosynthesis, photosynthetic organisms that are not plants, and includes species from multiple distinct clades. Such organisms range from unicellular ...

and

fungi A fungus (: fungi , , , or ; or funguses) is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts and mold (fungus), molds, as well as the more familiar mushrooms. These organisms are classified as one ...

Petrographic Petrography is a branch of petrology that focuses on detailed descriptions of rocks. Someone who studies petrography is called a petrographer. The mineral content and the textural relationships within the rock are described in detail. The classi ...

analysis of a

thin section In optical mineralogy and petrography, a thin section (or petrographic thin section) is a thin slice of a rock or mineral sample, prepared in a laboratory, for use with a polarizing petrographic microscope, electron microscope and electron ...

has uncovered the presence of

lithified Lithification (from the Ancient Greek word ''lithos'' meaning 'rock' and the Latin-derived suffix ''-ific'') is the process in which sediments compact under pressure, expel connate fluids, and gradually become solid rock. Essentially, lithificati ...

structures and

micrite Micrite is a limestone constituent formed of calcareous particles ranging in diameter up to four μm formed by the recrystallization of lime mud. Flügel, Erik, ''Microfacies of Carbonate Rocks: Analysis, Interpretation and Application,'' Springe ...

, present as laminated to clotted with chocolate-brown blebs. These are identical to

microbialites Microbialite is a benthic sedimentary deposit made of carbonate mud (particle diameter less than 5 μm) that is formed with the mediation of microbes. The constituent carbonate mud is a type of '' automicrite'' (or ''authigenic carbonate mud'') ...

observed in modern and ancient stromatolitic carbonates. Laboratory observations with scanning electron microscope (SEM) have also confirmed the presence of calcified bacteria, micro-rods, and needle

. Organic mats (yellow-orange in colour) are made up of mineralized filamentous bacteria, bacterial stalks,

cells Cell most often refers to: * Cell (biology), the functional basic unit of life * Cellphone, a phone connected to a cellular network * Clandestine cell, a penetration-resistant form of a secret or outlawed organization * Electrochemical cell, a d ...

and sheaths. Thus, these studies have indicated that

microorganism A microorganism, or microbe, is an organism of microscopic scale, microscopic size, which may exist in its unicellular organism, single-celled form or as a Colony (biology)#Microbial colonies, colony of cells. The possible existence of unseen ...

s have actively influenced the genesis of speleothems of the Borra Caves.

Biological environment

Micro organisms

The effect of microorganisms in the mats on the cave formation and their role on iron mineral precipitation has been further studied. A report indicates a link between iron–rich mats formation and iron precipitating bacteria.

Fauna and flora

The

fauna Fauna (: faunae or faunas) is all of the animal life present in a particular region or time. The corresponding terms for plants and fungi are ''flora'' and '' funga'', respectively. Flora, fauna, funga and other forms of life are collectively ...

observed in the caves are predominantly bats, as well as the

golden gecko The golden gecko (''Gekko badenii)'', also known commonly as Baden's Pacific gecko, is a species of lizard in the family Gekkonidae. The species is native to Vietnam. Etymology The specific name, ''badenii'', refers to '' Núi Bà Đen'' (Black ...

. The type of bat reported is the fulvous fruit bat ('' Rousettus leschenaultii'') – a species which roosts in large caves, old buildings, dungeons and dark areas of old forts. This species has short and slender musculature with large, well developed eyes. They feed on

flower Flowers, also known as blooms and blossoms, are the reproductive structures of flowering plants ( angiosperms). Typically, they are structured in four circular levels, called whorls, around the end of a stalk. These whorls include: calyx, m ...

s and

fruit In botany, a fruit is the seed-bearing structure in flowering plants (angiosperms) that is formed from the ovary after flowering. Fruits are the means by which angiosperms disseminate their seeds. Edible fruits in particular have long propaga ...

s, particularly

jamun ''Syzygium cumini'', commonly known as Malabar plum, Java plum, black plum, jamun, jaman, jambul, or jambolan, is an evergreen tropical tree in the flowering plant family Myrtaceae, and favored for its fruit, timber, and ornamental value. It is ...

guava Guava ( ), also known as the 'guava-pear', is a common tropical fruit cultivated in many tropical and subtropical regions. The common guava '' Psidium guajava'' (lemon guava, apple guava) is a small tree in the myrtle family (Myrtaceae), nativ ...

silk Silk is a natural fiber, natural protein fiber, some forms of which can be weaving, woven into textiles. The protein fiber of silk is composed mainly of fibroin and is most commonly produced by certain insect larvae to form cocoon (silk), c ...

cotton Cotton (), first recorded in ancient India, is a soft, fluffy staple fiber that grows in a boll, or protective case, around the seeds of the cotton plants of the genus '' Gossypium'' in the mallow family Malvaceae. The fiber is almost pure ...

and

mango A mango is an edible stone fruit produced by the tropical tree '' Mangifera indica''. It originated from the region between northwestern Myanmar, Bangladesh, and northeastern India. ''M. indica'' has been cultivated in South and Southeast As ...

Stygofauna

''Habrobathynella borraensis'' was described from the Borra Caves. It is the first Indian cavernicolous species of the genus ''Habrobathynella''.

Location and access

The caves are located in the Ananthagiri hills range of the

Araku valley Araku Valley is a hill station in the Alluri Sitharama Raju district of Andhra Pradesh, India, located 111 km from Visakhapatnam. Geography Araku is located in the Eastern Ghats about from Visakhapatnam, close to the Odisha state border. The ...

of the

. The caves are from

Bhubaneshwar Bhubaneswar () is the capital and the largest city of the Indian state of Odisha. It is located in the Khordha district. The suburban region, especially the old town, was historically often depicted as ''Chakra Khetra'' and ''Ekamra Khetra'' ( ...

Odisha Odisha (), formerly Orissa (List of renamed places in India, the official name until 2011), is a States and union territories of India, state located in East India, Eastern India. It is the List of states and union territories of India by ar ...

and from

Hyderabad Hyderabad is the capital and largest city of the Indian state of Telangana. It occupies on the Deccan Plateau along the banks of the Musi River (India), Musi River, in the northern part of Southern India. With an average altitude of , much ...

, both via National Highway 5. The caves are well connected by

road A road is a thoroughfare used primarily for movement of traffic. Roads differ from streets, whose primary use is local access. They also differ from stroads, which combine the features of streets and roads. Most modern roads are paved. Th ...

rail Rail or rails may refer to: Rail transport *Rail transport and related matters *Railway track or railway lines, the running surface of a railway Arts and media Film * ''Rails'' (film), a 1929 Italian film by Mario Camerini * ''Rail'' (1967 fil ...

and air services. The nearest international airport is

Visakhapatnam Airport Visakhapatnam Airport , officially known as Visakhapatnam International Airport, is a customs airport serving the city of Visakhapatnam, Andhra Pradesh, India. It also operates as a civil enclave on the Indian Navy airbase, INS ''Dega''. It ...

, from Borra Caves, which is from the

city center. Vishkapatnam is away by road. It is mostly a hill road and the journey takes about three hours. Train services operate on the

Kothavalasa Kothavalasa is a town in Vizianagaram district of the Indian state of Andhra Pradesh. It is located in Kothavalasa mandal of Vizianagaram revenue division. It is located 30 km from the city of Visakhapatanam Geography Kothavalasa is locat ...

Kirandul Kirandul is a town and a municipality in Dantewada district in the Indian state of Chhattisgarh. It is located roughly 400 km south of Raipur, capital of Chhattisgarh and 41 km southwest of Dantewada-the district headquarters. The w ...

railway line in

East Coast Railway The East Coast Railway (abbreviated as ECoR) is one of the 19 railway zones of Indian Railways. It came into existence on 01-April-2003. It headquarters are located at . History Consequent upon the parliament's approval, East Coast Railway wa ...

Indian Railways Indian Railways is a state-owned enterprise that is organised as a departmental undertaking of the Ministry of Railways (India), Ministry of Railways of the Government of India and operates India's national railway system. , it manages the fou ...

. The train journey over a distance of from the Vishkapatanam railway station passes through Eastern Ghats (hill) section), which has 30 tunnels en route. The journey by train takes about five hours to the Railway Station near the caves called the Borra Guhalu Railway station.

Visitor information

Guided tours for a day trip to the Borra Caves cover interesting attractions like the Tyada Railway Tunnel, Damuku View Point, Ananthagiri

Coffee Coffee is a beverage brewed from roasted, ground coffee beans. Darkly colored, bitter, and slightly acidic, coffee has a stimulating effect on humans, primarily due to its caffeine content, but decaffeinated coffee is also commercially a ...

Plantation Plantations are farms specializing in cash crops, usually mainly planting a single crop, with perhaps ancillary areas for vegetables for eating and so on. Plantations, centered on a plantation house, grow crops including cotton, cannabis, tob ...

, Padmapuram Gardens and the Araku Valley. For the benefit of the visitors, an information board at the entry point to the caves gives some details of the caves and its surroundings (pictured). An Arraku and Borra rail-cum-road package tour organized by the Andhra Pradesh State Tourism Department is available for visitors keen to see the Borra Caves. A walk around the caves provides views of the mountainous area which is rich in flora and fauna. The Andhra Pradesh State Tourism Department has installed 26 mercury, sodium vapor and

halogen The halogens () are a group in the periodic table consisting of six chemically related elements: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and the radioactive elements astatine (At) and tennessine (Ts), though some authors would ...

electric lamps, which provide views of the formations. The Araku valley, a hill station about from the Borra Caves, is also a tourist attraction for people visiting the caves. November and December are ideal months to visit the caves. Borra caves 1

References

*Ramesh Y (1990). Geomorphic Studies in Upper Gostani River Basin with Special References to Borra (Karst) Caves Visakhapatnam District, A.P., India, India. *Le Bas, M.J., Subbarao, K.V. and Walsh, J.W. Metacarbonatite or marble? – the case of the carbonate, pyroxenite, calcite-apatite rock complex at Borra, Eastern Ghats, India, ''Journal of Asian Earth Sciences'', 20, 2002, 127–140.

External links

* {{usurped,
Borra Caves
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Borra Caves in YouTube
Caves of Andhra Pradesh Geology of Andhra Pradesh Show caves in India