Carlsbad Caverns has three major levels, the deepest of which is more than 1,000 feet (305 m) under the earth.
Explorers have mapped 30 miles (48 km) of caves and corridors in the main cavern, 3 miles (5 km) of which are open to visitors.
The Big Room features a 255-foot (78-m) high ceiling and a stalagmite called the Giant Dome, which is 62 feet (19 m) tall.
The caverns are part of Carlsbad Caverns National Park, which also protects 86 other caves in the Guadalupe Mountains area.
Carlsbad means “Charles’ Bath” in German.
