A type of limestone formation found in caves.
The park has two entries on the National Register of Historic Places: The Caverns Historic District and the Rattlesnake Springs Historic District. Approximately two thirds of the park has been set aside as a wilderness area, helping to ensure no future changes will be made to the habitat.
Peak visitation typically occurs on the weekends following Memorial Day and the 4th of July. The park entrance is located on US Highway 62/180 approximately 18 miles (29 km) southwest of Carlsbad, New Mexico. The park participates in the Junior Ranger Program.
Carlsbad Caverns includes the second largest cave chamber in the world, the Big Room, a natural limestone chamber which is almost 4,000 feet (about 1,219 m) long, 625 feet (190.5 m) wide, and 350 feet (about 107 m) high at the highest point. The largest in the world is the Sarawak Chamber in Malaysia.