North America’s largest single cave chamber (by volume) is in the “Big Room” at Carlsbad Caverns in Carlsbad National Park, both of which get their name from the nearby town of Carlsbad, New Mexico. Also called “The Hall of the Giants”, The Big Room has 350k+ square feet of floor space and is simply jaw-dropping.

Other popular “rooms” in the gigantic cave system are Guadalupe Room (2nd largest), Bat Cave (home to most of the 400k bats), Lake of the Clouds (lowest point in the cave), King’s Palace (featuring a castle-like formation), and Queen’s Chamber (the most beautiful of the rooms).

The park actually contains 100+ caves, 3 of which are open to the public, and a variety of above-ground activities worth planning to explore.