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  2. Mammoth Cave National Park - Wikipedia

    en.wikipedia.org/wiki/Mammoth_Cave_National_Park

    The Bottomless Pit in Mammoth Cave, woodcut (1887) The limestone layers of the stratigraphic column beneath the Big Clifty, in increasing order of depth below the ridgetops, are the Girkin Formation, the Ste. Genevieve Limestone, and the St. Louis Limestone. The large Main Cave passage seen on the Historic Tour is located at the bottom of the ...

  3. Stephen Bishop (cave explorer) - Wikipedia

    en.wikipedia.org/wiki/Stephen_Bishop_(cave_explorer)

    Stephen Bishop (c. 1821 – 1857) was an American cave explorer and self-taught geologist known for being one of the first people to explore and map Mammoth Cave in the U.S. state of Kentucky. Mammoth Cave is regarded as the longest cave system in the world and Bishop's map of the cave, hand-drawn from memory off-site in 1842, was included in a ...

  4. You have to look beneath the surface to fully appreciate ...

    www.aol.com/look-beneath-surface-fully...

    “The Bottomless Pit is only about 105 feet deep, but back in the early 1800s, when (settlers) were first exploring and touring the cave, the tourists that would get to the area known as the ...

  5. Speedwell Cavern - Wikipedia

    en.wikipedia.org/wiki/Speedwell_Cavern

    The narrow adit is permanently flooded, so after descending a long staircase, access to the cave is made by boat. At the end of the adit, the cavern opens up with fluorspar veins, stalactites and stalagmites, and the so-called "Bottomless Pit". This chamber has an underground lake with a 20 metres (66 ft) high waterfall and an extremely deep ...

  6. New Athos Cave - Wikipedia

    en.wikipedia.org/wiki/New_Athos_Cave

    The abyss on a slope of the Iverian Mountain was known for ages, referred to as the "Bottomless Pit". It was explored in 1961 by an expedition of four: Zurab Tatashidze, [2] Arsen Okrojanashvili, [3] Boris Gergedava, [4] and Givi Smyr. [5] Since 1975, it has been a major tourist attraction, featuring its own underground railway. [6]

  7. Carlsbad Caverns National Park - Wikipedia

    en.wikipedia.org/wiki/Carlsbad_Caverns_National_Park

    In 1993, a series of small passages totaling nearly a mile in combined length was found in the ceiling of the New Mexico Room. Named "Chocolate High", it was the largest discovery in the cave since the Guadalupe Room was found in 1966. The Bottomless Pit was originally said to have no bottom.

  8. Noon's Hole - Wikipedia

    en.wikipedia.org/wiki/Noon's_Hole

    A Sumera is a bottomless pit, and locals initially treated Noon's Hole as a supernatural area, viewing it with suspicion and fear. However, in August 1895, the French cave explorer Édouard-Alfred Martel explored the cave for the first time, descending to 20 metres (66 ft). [4]

  9. Grootslang - Wikipedia

    en.wikipedia.org/wiki/Grootslang

    The Grootslang is said to be a huge serpent that dwells in a cave known as the "Wonder Hole" or the "Bottomless Pit" located in the Richtersveld, which is said to connect to the sea 64 kilometres (40 mi) away. According to local legend, the cave is filled with diamonds.