As the name suggests, Carlsbad Caverns is a collection of over 115 caves. Located in southern New Mexico, these caverns are carved from limestone, and it is possible for visitors to descend more than 900 feet (275 meters) below the surface of the earth on a guided tour.
The largest single cave chamber in all of North America is found here and is known as the Big Room. Within the room itself, visitors can set off on a 90-minute walk exploring the incredible underground environment.