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| Established to preserve Carlsbad Cavern and numerous other caves within a Permian-age fossil reef, the park contains 88 known caves, including the nation's deepest limestone cave--1,597 feet (486.8 m)and third longest. Carlsbad Cavern, with one of the world's largest underground chambers and countless formations, is also highly accessible, with a variety of tours offered year-round |
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