hotel
Many hotels can be considered destinations in themselves, by dint of unusual features of the lodging or its immediate environment:
Treehouse hotels
Some hotels are built with living trees as structural elements, for example the Costa Rica Tree House in the Gandoca-Manzanillo Wildlife Refuge, Costa Rica; the Treetops Hotel in Aberdare National Park, Kenya; the Ariau Towers near Manaus, Brazil, on the Rio Negro in the Amazon; and Bayram's Tree Houses in Olympos, Turkey.
Bunker hotels
The Null Stern Hotel in Teufen, Appenzellerland, Switzerland and the Concrete Mushrooms in Albania[1] are former nuclear bunkers transformed into hotels.
Cave hotels
Desert Cave Hotel in Coober Pedy, South Australia and the Cuevas Pedro Antonio de Alarcón (named after the author) in Guadix, Spain, as well as several hotels in Cappadocia, Turkey, are notable for being built into natural cave formations, some with rooms underground. They are all built underground.
Capsule hotels
Capsule hotels are a type of economical hotel that are found in Japan, where people sleep in stacks of rectangular containers.
Ice and snow hotels
The Ice Hotel in Jukkasjärvi, Sweden, and the Hotel de Glace in Duschenay, Canada, melt every spring and are rebuilt each winter; the Mammut Snow Hotel in Finland is located within the walls of the Kemi snow castle; and the Lainio Snow Hotel is pa
rt of a snow village near Ylläs, Finland.
Garden hotels
Garden hotels, famous for their gardens before they became hotels, include Gravetye Manor, the home of garden designer William Robinson, and Cliveden, designed by Charles Barry with a rose garden by Geoffrey Jellicoe.
Underwater hotels
Some hotels have accommodation underwater, such as Utter Inn in Lake Mälaren, Sweden. Hydropolis, project cancelled 2004 in Dubai, would have had suites on the bottom of the Persian Gulf, and Jules Undersea Lodge in Key Largo, Florida requires scuba diving to access its rooms.
from : wikipedia.com