Grand Canyon Caverns is a natural limestone cavern and also the largest dry cavern in the U.S. An elevator takes you 210 feet underground where the narrated tour proceeds to the Crystal Room, which contains stunning formations of selenite crystals. You will tour the Chapel of the Ages cavern and travel through a 160-foot tunnel to the Snowball Palace. See the mummified bobcat that fell into the cavern over 150 years ago and the remains of a prehistoric ground sloth. Physically challenged guests can go on a shorter 30 minute tour viewing the first room. If you are looking for a bigger adventure, ask about their Explorer Tour!