There are several cave hotels throughout the world in such places as Australia, Spain, Turkey, the United States and several other countries. Rooms in cave hotels typically have the entire walls or even two or three walls made out of the mountain or other hard sediment formation that the hotel is built into.

^Treats

For instance there is the cave hotel in Southern Australia, an Underground hotel and casino, in Coober Pedy. The Desert Cave Hotel allows you to experience dug-out style living, underground shops, bar and opal display areas. Sleeping underground is a very unique experience. Quiet, cool, dark and airy, the rooms seem spacious with their high ceilings.

The unique Desert Cave Hotel, famous as the only international rated underground hotel in the world, allows you to experience dug-out style living. It's the experience to enjoy if you are in the area. They have all of the amenities, fine dining, a pool, a beautiful spa and a well equipped gym.

There is one underwater hotel in the entire world that can be reached without the aid of scuba gear which is really a unique hotel. The Utter Inn located in Lake Malaren, Sweden features one large room and visitors can simply walk down into the hotel while viewing underwater. This same company also has an undersea lodge in Key Largo, Florida that does require scuba diving to reach.