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  2. Great Stalacpipe Organ - Wikipedia

    en.wikipedia.org/wiki/Great_Stalacpipe_Organ

    Console of the organ, an electrically actuated lithophone. The Great Stalacpipe Organ is an electrically actuated lithophone located in Luray Caverns, Virginia, USA.Covering 3.5 acres of the cavern, it is considered the world's largest instrument by Guinness World Records.

  3. Mammoth Cave National Park - Wikipedia

    en.wikipedia.org/wiki/Mammoth_Cave_National_Park

    Tourists inside the cave. The park's mission is stated in its foundation document: [7] The purpose of Mammoth Cave National Park is to preserve, protect, interpret, and study the internationally recognized biological and geologic features and processes associated with the longest known cave system in the world, the park’s diverse forested karst landscape, the Green and Nolin rivers, and ...

  4. File:Mammoth cave, Kentucky, US, tourists inside.jpg

    en.wikipedia.org/wiki/File:Mammoth_cave...

    Park Nazzjonali ta' Mammoth Cave; Metadata. This file contains additional information, probably added from the digital camera or scanner used to create or digitize it.

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

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

    Mammoth Cave is located about 30 minutes outside Bowling Green, Kentucky by car. According to the park’s website, prehistoric seas deposited limestone in the area around 325 million years ago ...

  6. If you visit Mammoth Cave National Park - AOL

    www.aol.com/great-great-grandfather-enslaved...

    Established in 1941, Mammoth Cave National Park attracts about a half million visitors a year, but this ranger's connection to it goes further back.

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

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

    Mammoth Cave, the longest known cave system in the world 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 ]

  8. File:Mammoth Cave tour.jpg - Wikipedia

    en.wikipedia.org/wiki/File:Mammoth_Cave_tour.jpg

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  9. File:Gypsum speleothem (Cleaveland Avenue, Mammoth Cave.jpg

    en.wikipedia.org/wiki/File:Gypsum_speleothem...

    Cleaveland Avenue is at Level C in the Mammoth Cave system. Level C passages started forming about 1.9 million years ago. A subterranean river used to flow through the passage. Cleaveland Avenue is accessible to modern tourists on the Grand Avenue Tour, the Wild Cave Tour, and the Cleaveland Avenue Tour. Date: 7 July 2007, 11:38: Source