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Carlsbad Caverns, United States
Carlsbad Caverns contains over 119 known caves formed when sulfuric acid dissolved the surrounding limestone reef — a remnant of an ancient inland sea. The Big Room, at 8.2 acres, is the largest single cave chamber in North America. The natural entrance descends 750 feet through switchbacks past dramatic formations. From May through October, hundreds of thousands of Brazilian free-tailed bats spiral out of the cave at sunset.
explore by interest
The natural entrance route is strenuous — the return is a 750-foot climb. Elevators are available as an alternative. The cave is 56°F year-round; bring a jacket.
Year-round for the caves. May through October for the bat flight program. Summer surface temperatures exceed 100°F.