Idrija ( or ', , Venetian Slovene dialect ''Juruda'') is a border river between

Slovenia Slovenia, officially the Republic of Slovenia, is a country in Central Europe. It borders Italy to the west, Austria to the north, Hungary to the northeast, Croatia to the south and southeast, and a short (46.6 km) coastline within the Adriati ...

and

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 ...

. It separates the

Gorizia Hills The Gorizia Hills ( or ''Collio''; or ''Brda''; ) is a hilly microregion in western Slovenia and northeastern Italy. It lies on the right bank of the Soča (''Isonzo'') River, north of the Italian town of Gorizia, after which it is named. The r ...

from the

Slavia Friulana Slavia Friulana, which means Friulian Slavia (), is a small mountainous region in northeastern Italy and it is so called because of its Slavic population which settled here in the 8th century AD. The territory is located in the Italian region of ...

. It emerges under the Kolovrat ridge and flows southwest towards

Friuli Friuli (; ; or ; ; ) is a historical region of northeast Italy. The region is marked by its separate regional and ethnic identity predominantly tied to the Friulians, who speak the Friulian language. It comprises the major part of the autono ...

where it joins the Torre. The river was historically important as separating the

Republic of Venice The Republic of Venice, officially the Most Serene Republic of Venice and traditionally known as La Serenissima, was a sovereign state and Maritime republics, maritime republic with its capital in Venice. Founded, according to tradition, in 697 ...

from the Habsburg Lands,

from

Austria-Hungary Austria-Hungary, also referred to as the Austro-Hungarian Empire, the Dual Monarchy or the Habsburg Monarchy, was a multi-national constitutional monarchy in Central Europe#Before World War I, Central Europe between 1867 and 1918. A military ...

, and since 1947 Italy from Yugoslavia.

References

Border rivers Rivers of the Slovene Littoral Rivers of Friuli-Venezia Giulia {{Slovenia-river-stub