120 caves known at this time: This number will change as exploration continues. Lechuguilla Cave, > 140 miles (225 km); 1,604.2 feet (489 m) deep. Access to this cave is limited to research and exploration only. Carlsbad Cavern, > 30 miles (48 km). Developed for public touring. The Big Room is 8.2 acres (3.3 hectares)-- the largest, readily accessible cave chamber in North America.
Lechuguilla Cave, > 140 miles|Carlsbad Cavern, > 30 miles
Lechuguilla Cave, > 140 miles|Carlsbad Cavern, > 30 miles