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Great Onyx Cave

Great Onyx Cave is a cave located in Mammoth Cave National Park in Kentucky, United States. The National Park Service offers a commercial tour of the cave.

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Cave data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).

More caves in United States

  1. Lechuguilla Cave489 m deep
  2. Carlsbad Caverns National Park333 m deep
  3. Natural Tunnel State Park0.3 km
  4. Merrill Cave0.2 km
  5. Layser Cave0 km

Other notable caves worldwide

  1. Mammoth Cave · Australia686 km
  2. Sistema Sac Actun · Mexico119.2 m
  3. Lechuguilla Cave · United States489 m
  4. Optymistychna Cave · Ukraine20 m
  5. Veryovkina Cave · Georgia2,212 m
  6. Krubera Cave · Georgia2,199 m
  7. Sarma cave · Georgia1,830 m
  8. Clearwater Cave · Malaysia109 km