Krubera-voronya

Krubera Cave (Georgian: კრუბერის გამოქვაბული or კრუბერის ღრმული, romanized: k'ruberis gamokvabuli or k'ruberis ghrmuli, Abkhaz: Ӡоу Аҳаҧы; also known as Voronya Cave, sometimes spelled Voronja Cave) is the second-deepest-known cave on Earth, after the Veryovkina Cave. It is located in the Arabika Massif of the Gagra Range of the Western Caucasus, in the Gagra District of Abkhazia, a partly recognised state, previously part of Soviet Georgia. The difference in elevation of the highest cave entrance (Arbaika) and its deepest explored point is 2,199 ± 20 metres (7,215 ± 66 ft). It became the deepest-known cave in the world in 2003 when the expedition of the Ukrainian Speleological Association reached a depth of 1,910 m (6,270 ft) which exceeded the depth of the previous deepest-known cave, Lamprechtsofen, in the Austrian Alps, by 80 metres (260 ft). In 2006, for the first time in the history of speleology, the Ukrainian Speleological Association expedition reached a depth greater than 2,000 metres (6,600 ft), and explored the cave to −2,080 m (−6,824 ft). Ukrainian diver Gennadiy Samokhin extended the cave by diving in the terminal sump to 46 metres' depth in 2007 and then to 52 m in 2012, setting successive world records of 2,191 m and 2,197 m, respectively. Krubera is one of the two known caves on Earth deeper than 2,000 metres.