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  2. List of longest caves in the United States - Wikipedia

    en.wikipedia.org/wiki/List_of_longest_caves_in...

    The following is a list of the longest caves in the United States per length (over 50 kilometres or 30 miles) of documented passageways. Many passageways are still being discovered; this list is based on the latest verifiable data. [1] Some caves and cave systems are partially accessible to the general public.

  3. Carlsbad Caverns National Park - Wikipedia

    en.wikipedia.org/wiki/Carlsbad_Caverns_National_Park

    Carlsbad Caverns National Park is a national park of the United States in the Guadalupe Mountains of southeastern New Mexico. The primary attraction of the park is the show cave Carlsbad Cavern. Visitors to the cave can hike in on their own via the natural entrance or take an elevator from the visitor center.

  4. List of caves in the United States - Wikipedia

    en.wikipedia.org/wiki/List_of_caves_in_the...

    Bell Witch Cave; Blue Spring Cave; Big Bone Cave; Craighead Caverns - also called Lost Sea [1] Cumberland Caverns; Devilstep Hollow Cave; Dunbar Cave; Forbidden Caverns; Hubbard's Cave; Lookout Mountain Caverns; Lost Cove Cave; Nickajack Cave; Raccoon Mountain Caverns; Rumbling Falls Cave; Ruby Falls; Snail Shell Cave; Tuckaleechee Caverns

  5. List of longest caves - Wikipedia

    en.wikipedia.org/wiki/List_of_longest_caves

    Caves are found around the world. The largest form in areas of karst landforms whose rocks dissolve easily. Preferable conditions for karst cave formation are adequate precipitation, enough plants and animals to produce ample carbon dioxide, and a landscape of gentle hills which drains slowly.

  6. Mammoth Cave National Park - Wikipedia

    en.wikipedia.org/wiki/Mammoth_Cave_National_Park

    Mammoth Cave National Park is a national park of the United States in south-central Kentucky. It encompasses portions of Mammoth Cave, the longest known cave system in the world. The park's 52,830 acres (21,380 ha) are located primarily in Edmonson County, with small areas extending eastward into Hart and Barren counties.

  7. Craighead Caverns - Wikipedia

    en.wikipedia.org/wiki/Craighead_Caverns

    Cave divers have explored several rooms that are completely filled with water, without reaching the end of the cave. This exploration was conducted in the 1970s. For many years The Lost Sea was considered the world's largest underground lake; it is the largest in the United States and is still recognized as the world's second-largest, non ...

  8. Grand Canyon Caverns - Wikipedia

    en.wikipedia.org/wiki/Grand_Canyon_Caverns

    They are among the largest dry caverns in the United States. Dry caverns comprise only 3% of caverns in the world. Because of the lack of water, stalagmites and stalactites are rare in the caverns. During the Mississippian Period, 345 million years ago, the southwestern United States was covered by ocean. Skeletons of sea life settling to the ...

  9. Jewel Cave National Monument - Wikipedia

    en.wikipedia.org/wiki/Jewel_Cave_National_Monument

    Jewel Cave National Monument contains Jewel Cave, currently the fifth longest cave in the world and second longest cave in the United States, with 220.01 miles (354.07 km) of mapped passageways as of May 2024. [3] [4] [5] It is located approximately 13 miles (21 km) west of the town of Custer in Black Hills of South Dakota.