The Southwestern state known for the Carlsbad Caverns is New Mexico.

Carlsbad Caverns, located in southeastern New Mexico, is a UNESCO World Heritage Site and a part of Carlsbad Caverns National Park. It is renowned for its vast underground limestone caves, including the famous "Big Room," one of the largest natural underground chambers in North America. The caverns were formed millions of years ago by sulfuric acid dissolving the surrounding rock, creating intricate formations like stalactites and stalagmites. Visitors often enjoy exploring the caves and watching the nightly bat flight program, where thousands of bats emerge from the caverns. This unique destination highlights New Mexico's natural wonders and geological history.