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Lechuguilla Cave in New Mexico Rated as Longest Cave in the World
Lechuguilla Cave - Carlsbad Caverns National Park (U.S. National Park Service)
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Lechuguilla Cave – Carlsbad, New Mexico - Atlas Obscura
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The Lake Castrovalva area of Lechuguilla (cave) in Carlsbad Caverns National Park, New Mexic… | Carlsbad caverns national park, Cool places to visit, National parks