Krubera Cave

Krubera Cave (Abkhaz: Ӡоу Аҳаҧы; Georgian: კრუბერის გამოქვაბული or კრუბერის ღრმული, romanized: k'ruberis gamokvabuli or k'ruberis ghrmuli; also known as Voronya Cave, sometimes spelled Voronja Cave) is the deepest known cave on Earth. It is located in the Arabika Massif of the Gagra Range of the Western Caucasus, in the Gagra District of Abkhazia, a disputed region of 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 Ukrainian Speleological Association reached a depth of 1,910 m (6,270 ft). This exceeded the previous record, 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 m (6,560 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 deeper than 2,000 metres, the other being Veryovkina Cave in the same mountain range.