Carlsbad Caverns National Park

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Established to preserve Carlsbad Cavern and numerous other caves within a Permian-age fossil reef, the park contains more than 100 known caves, including Lechuguilla Cave;the nation's deepest limestone cave at 1,567 feet (478m) and fourth longest.

Carlsbad Cavern, with one of the world's largest underground chambers and countless formations, is highly accessible, with a variety of tours offered year-round.