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  2. Boesmansgat - Wikipedia

    en.wikipedia.org/wiki/Boesmansgat

    Boesmansgat (or Bushmansgat), also known in English as "Bushman's Hole", is a deep submerged freshwater cave (or sinkhole) in the Northern Cape province of South Africa, which has been dived to a depth of 282.6 metres (927 ft). Boesmansgat was believed to have first been explored by amateur diver Mike Rathbourne, in 1977.

  3. Hranice Abyss - Wikipedia

    en.wikipedia.org/wiki/Hranice_Abyss

    Hranice Abyss. Hranice Abyss (Czech: Hranická propast) is the deepest flooded pit cave in the world. It is a karst sinkhole near the town of Hranice, Czech Republic.The greatest confirmed depth is 519.5 m (1,704 ft), of which 450 m (1,476 ft) is underwater.

  4. Benxi Water Caves - Wikipedia

    en.wikipedia.org/wiki/Benxi_Water_Caves

    Temperature inside the cave is constant throughout the year, at around 12 °C (54 °F), though slightly warmer in summer than winter. In addition to the water caves, the national park also offers tourist attractions such as trekking to the top of the mountain, Woodstone Kingdom, dinghy rafting on the Taizi River, and the geological museum which ...

  5. Pluragrotta - Wikipedia

    en.wikipedia.org/wiki/Pluragrotta

    A popular cave diving destination, Pluragrotta attracts more divers than any other cave in Scandinavia. Visibility in the cave waters is high. The cave's passages were formed by the flow of the Plura river over limestone, and the cave system includes marble formations. A number of species have been identified in the cave ecosystem.

  6. Velebit caves - Wikipedia

    en.wikipedia.org/wiki/Velebit_caves

    The "Lukina jama" cave is 1431 m deep (2013), the deepest cave in Croatia, 14th deepest cave in the world and the deepest cave in southeast Europe. [1] At its foot, there are ponds and streams including one of the largest known colonies of subterranean leeches ( Erpobdella mestrovi ), which has been ascertained to represent a new species, genus ...

  7. Sistema Ox Bel Ha - Wikipedia

    en.wikipedia.org/wiki/Sistema_Ox_Bel_Ha

    'Three Paths of Water'; short Ox Bel Ha) is a cave system in Quintana Roo, Mexico. It is the longest explored underwater cave in the world [2] and ranks second including dry caves. [3] As of January 2024 the surveyed length is 496.8 kilometers (308.7 mi) of underwater passages. [2] There are more than 160 cenotes in the system. [2] [4]

  8. Movile Cave - Wikipedia

    en.wikipedia.org/wiki/Movile_Cave

    Movile Cave (Romanian: Peștera Movile) is a cave near Mangalia, Constanța County, Romania discovered in 1986 by Cristian Lascu a few kilometers from the Black Sea coast. [1] It is notable for its unique groundwater ecosystem abundant in hydrogen sulfide and carbon dioxide , but low in oxygen .

  9. Macocha Gorge - Wikipedia

    en.wikipedia.org/wiki/Macocha_Gorge

    Macocha. The Macocha Abyss (Czech: propast Macocha), also known as the Macocha Gorge, is a sinkhole in the Moravian Karst cave system of the Czech Republic.The sinkhole is 138.5 metres (454 ft) deep, which makes it the deepest of its kind (light hole type) in Central Europe.