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  2. List of lava tubes - Wikipedia

    en.wikipedia.org/wiki/List_of_Lava_Tubes

    Elmenteita Badlands north of Mt. Eburru – several small caves [2] Leviathan Cave – At 12.5 kilometres, it is the longest lava tube in Africa. [3] Emuruangogolak Volcano caves [2] North Chyulu hills area – 20 caves are known [2] Hells Teeth [2] Kimakia Caves [2] Mathioni [2] Skull Caves [2] Kimakia Cave [2]

  3. Caverns of Sonora - Wikipedia

    en.wikipedia.org/wiki/Caverns_of_Sonora

    The cave is formed in 100-million-year-old Segovia Limestone, of the Edwards Group. The formation of the cave itself probably occurred between 1.5 and 5 million years ago. The cave is formed primarily along joints, which allowed gases to rise up from depths of around 1.5 mi (2.4 km) to then depths of about 300 ft (91 m).

  4. List of karst areas - Wikipedia

    en.wikipedia.org/wiki/List_of_karst_areas

    Shaanxi tiankeng cluster, discovered in 2016, it is one of the largest in the world comprising forty-nine sinkholes and more than fifty funnels ranging from 50–100 metres in diameter. South China Karst, World Heritage Site; Stone Forest; Xiaozhai Tiankeng, also known as the Heavenly Pit, is the world's largest sinkhole. [3]

  5. Sudwala Caves - Wikipedia

    en.wikipedia.org/wiki/Sudwala_Caves

    Concerts were stopped due to vandalism in the caves in 2002, but were started again in 2006. Chris Chameleon performed in the caves with the Drakensberg Boys' Choir as part of the InniBos Arts Festival in 2012. The local Stevenson-Hamilton Pipe Band also performed in the caves on 10-03-2013 as part of World Bagpipe Day celebrations.

  6. Sistema Huautla - Wikipedia

    en.wikipedia.org/wiki/Sistema_Huautla

    Sistema Huautla is the deepest cave in the Western Hemisphere and the ninth deepest cave in the world, tied in depth with the cave Hirlatzhöhle of Austria; it is listed as the twenty-ninth longest at about 62.2 miles of surveyed passages compared to Mammoth Cave in Kentucky, USA, the longest cave system in the world at 420+ miles. [2]

  7. Catacombs Cave - Wikipedia

    en.wikipedia.org/wiki/Catacombs_Cave

    The caves found here were created by flows of smooth lava 10,500 to 65,000 years ago. [1] J. D. Howard was the first to record notes on exploration of the underground passages. He named it after catacombs as the many side passages reminded him of the burial places of ancient Rome. [2]

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  9. Sistema Dos Ojos - Wikipedia

    en.wikipedia.org/wiki/Sistema_Dos_Ojos

    As a separate system, Dos Ojos remained in the top ten, if not the top three, longest underwater cave systems in the world since the late 1980s. [3] Dos Ojos contains the deepest known cave passage in Quintana Roo with 119.1 meters (391 ft) of depth located at "The Pit" discovered in 1996 by cave explorers who came all the way from the main ...