Caucasus

Caucasus, mountain range in the Russian Federation between the Caspian and Black seas, 700 mi (1,127 km) long and up to 120 mi (193 km) wide, including the highest mountain in Europe, Mt. Elbrus (18,481 ft/ 5,633 m). Its northern parts belong to Europe, but its southern regions, bordering on Turkey and Iran, are part of Asia.

See also: Union of Soviet Socialist Republics.