Carlsbad Caverns is one of the largest cave systems in the world — over 120 mapped caves dissolved into the Permian-age Capitan Reef limestone, with the main Carlsbad Cavern containing the Big Room, a single chamber 4,000 ft long, 625 ft wide, and 255 ft high. The cave is entered either by the Natural Entrance trail (a 750-ft descent on a paved switchback path) or by the Bat Cave elevator that drops 754 ft to the underground rest area at the Big Room level. From late May through October, hundreds of thousands of Brazilian free-tailed bats stream out of the Natural Entrance at sunset — one of the longest-running ranger-led wildlife programs in the National Park System. From I-10 the access is Exit 24A in El Paso, then 145 mi east on US-62/180 through Carlsbad to Whites City and the 7-mile park road.
- Big Room is the largest single cave chamber in North America by volume
- Designated a UNESCO World Heritage Site in 1995
- Hundreds of thousands of Brazilian free-tailed bats roost in the Natural Entrance May–October
- 754-ft elevator descends to the Big Room — wheelchair accessible underground
- Daily timed-entry reservations ($1) are required for the cave; no walk-up entry