Carlsbad Caverns' "Big Room" is the largest single room you will ever see in American caves. At 8.2 acres, you will undoubtedly be impressed.
See the Hall of Giants that contains the largest formations in the cave system.
Do not miss the Bat Flight, as thousands of Mexican free-tailed bats exit the cave per minute for an evening hunt. When all is said and done, roughly a quarter-million bats have spiraled out of the cave in search of food.
Spelunking is a must if you really want to see what everyone else is missing. Visit the spectacular White Giant and Lower Cave. Formed by water 5 million years ago, the caverns lay deep underground and stay a constant 56 degrees—a great escape from the summer heat.