The southwestern state known for the Carlsbad Caverns and its impressive underground formations is New Mexico.

Situated in southeast New Mexico, Carlsbad Caverns National Park is well-known for its vast network of more than 119 caves that were created by the disintegration of limestone. The Big Room, one of the biggest subterranean spaces in North America, is located within the Carlsbad Cavern. The park is well-known for its breathtaking stalactites, stalagmites, and other unusual subterranean features and is a UNESCO World Heritage Site.