Mount Elbrus is the highest mountain in Europe, and the tenth most prominent peak in the world. A dormant volcano, Elbrus is in the Caucasus Mountains in Southern Russia, near the border with Georgia. Elbrus has two summits, both of which are dormant volcanic domes. The taller west summit is 5,642 metres (18,510 ft), the east summit is 5,621 metres (18,442 ft). The east summit was first ascended on 10 July 1829 (Julian calendar) by Khillar Khachirov, and the west summit in 1874 by a British expedition led by F. Crauford Grove and including Frederick Gardner, Horace Walker, and the Swiss guide Peter Knubel of St. Niklaus.