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Caves Of The National Parks: The Wonder Beneath

17 minutes 20 seconds
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There are 3900 caves in America's National Park System, and 21 are open to the public. Visits Mammoth Cave, Carlsbad Caverns, and the lava tube caves on Hawaii. Tours each and describes their unique features and formations. Emphasizes the delicate natural balance that exists in all caves.

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Runtime: 17 minutes 20 seconds

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