Carlsbad Caverns National Park

Location: New Mexico

Year Established: 1930

Area: 46,766.45 acres (189.3 km2)

Annual Visitors: 397,309

Carlsbad Caverns has 117 caves, the longest of which is over 120 miles (190 km) long. The Big Room is almost 4,000 feet (1,200 m) long, and the caves are home to over 400,000 Mexican free-tailed bats and sixteen other species. Above ground are the Chihuahuan Desert and Rattlesnake Springs.