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  2. Xiaozhai Tiankeng - Wikipedia

    en.wikipedia.org/wiki/Xiaozhai_Tiankeng

    The Xiaozhai Tiankeng is 626 meters (2,054 feet) long, 537 meters (1,762 feet) wide, and between 511 and 662 meters (1,677 and 2,172 ft) deep, with vertical walls. Its volume is 119,349,000 m³ and the area of its opening is 274,000 m 2. This material has been dissolved and carried away by the river. The sinkhole is a doubly nested structure ...

  3. Zacatón - Wikipedia

    en.wikipedia.org/wiki/Zacatón

    Zacatón is a thermal water-filled sinkhole belonging to the Zacatón system - a group of unusual karst features located in Aldama Municipality near the Sierra de Tamaulipas in the northeastern state of Tamaulipas, Mexico. At a total depth of 339 meters (1,112 ft), it is one of the deepest known water-filled sinkholes in the world.

  4. 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. [1][2] In 2020, a scientific expedition to the cave revealed that part of the system ...

  5. List of sinkholes - Wikipedia

    en.wikipedia.org/wiki/List_of_sinkholes

    Blue Hole (Red Sea) – a submarine sinkhole around 94 m (308 feet) deep in east Sinai, a few kilometres north of Dahab, Egypt on the coast of the Red Sea. Dead Sea sinkholes; Dean's Blue Hole – the world's second deepest known salt water blue hole with an entrance below the sea level; in the Bahamas

  6. Mystery sinkhole ranks among deepest in the world

    www.aol.com/mystery-sinkhole-ranks-among-deepest...

    The enormous pit in Tierra Amarilla, in the country's Atacama Desert region, measures 105-feet-wide (32 meters) and about 650-feet-deep (200 meters), according to Chile's National Geology and ...

  7. Great Blue Hole - Wikipedia

    en.wikipedia.org/wiki/Great_Blue_Hole

    The Great Blue Hole is a giant marine sinkhole off the coast of Belize. It lies near the center of Lighthouse Reef, a small atoll 70 km (43 mi) from the mainland and Belize City. The hole is circular in shape, 318 m (1,043 ft) across and 124 m (407 ft) deep. [1][2] It has a surface area of 70,650 square metres (760,500 sq ft).

  8. OceanGate co-founder is planning a trip to one of the world's ...

    www.aol.com/oceangate-co-founder-planning-trip...

    OceanGate co-founder is planning a trip to one of the world's deepest ocean sinkholes. ... Dean's Blue Hole is the third-deepest blue hole in the world, with a depth of 663 feet.

  9. 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. [citation needed]