Carlsbad Caverns National Park is located in the Guadalupe Mountains in southeastern New Mexico, as you pass through the Chihuahuan Desert and Guadalupe Mountains of southeastern New Mexico and west Texas. Filled with prickly pear, chollas, sotols and agaves—you might never guess there are more than 300 known caves beneath the surface. The park contains 113 of these caves, formed when sulfuric acid dissolved the surrounding limestone, creating some of the largest caves in North America. Visitors can hike into the interior rooms on their own via the natural entrance, or take an elevator (the exit for everyone) directly down into the center of the public cave area. Approximately two thirds of the park has also been set aside as a wilderness area, helping to ensure no future changes will be made to the habitat.
As seen at https://www.nps.gov/cave/index.htm and https://en.wikipedia.org/wiki/Carlsbad_Caverns_National_Park
Roswell, New Mexico
Carlsbad Caverns are 99 miles, a 2 hour drive, from Burnt Well Guest Ranch. A walk down the natural entrance will be a hike into massive caves 750 feet underground. It is one of the day trip options that are included in a 6 day package at Burnt Well. They are spectacular and highly receommended as your day trip if you have never seen them.
Winston, New Mexico
We call this the Grand Canyon of caves! Definately worth a trip if you have the time. Approximately 350 miles and a 7 hour trip from our ranch. This is a very neat place to stop and explore around. There are caverns of all sizes and there are more than 100 caves to see!