The De Vrouwe van Stavoren Hotel (Netherlands): made from recycled wine barrels
The one thing that might bother you, if you're not a wine enthusiast, is the smell of wine that the barrels still maintain. All in all the Barrel Hotel, in Stavoren, northern Netherlands, makes for a very pleasurable experience. General rates for a cask room are from 74-119 Euros a night with discounts of up to 75% off depending on season. If you go in the wintertime, a wine cask room can be as low as 18 Euros a night, cheaper than most hostels.
Poseidon Undersea Resort (Fiji): an underwater hotel
By early 2009, travelers will have the opportunity to stay at the grandiose Poseidon Undersea Resort. Nestled forty feet below the surface of the clear blue Fijian Lagoon, the underwater suites will be accessible by elevator. 70 percent of each suite is enveloped in Acrylic walls that allow for spectacular views of the ocean. Guests are invited to interact with the surroundings. At the push of a button the fish are fed, and a flip of a switch turns on the sparkling underwater lights.
Hôtel de Glace (Canada): made entirely out of ice and snow
Giraffe Manor (Kenya): where you dine with a friendly giraffe
As well as the giraffe, the property is also home to many species of birds, large families of warthogs and the elusive Bush Buck.
Das Park Hotel (Austria): where rooms are made of concrete pipes
With the amazing view below there is little else needed, except if you're staying in bed past 10am, when pajamas would be a wise thing to wear, as although you can look out - tourists can look in.