Texas is the southwestern state with the largest number of caves in the U.S.

Texas is home to more than 3,000 caves, making it the state with the largest number in the country. Many of these caves are located in the central and western parts of the state, including famous ones like the Carlsbad Caverns in New Mexico, which is part of the larger cave system that extends into Texas. The state's diverse geology and expansive land area contribute to the large number of caves found there.