Located near the Swedish village of Harads, this UFO Treehotel is one of a kind. So far there are five unique tree rooms available and twenty-four planned to be built. The five tree rooms that are currently available for booking are the Cabin, the Mirrorcube, the Bird's Nest, the Blue Cone and the UFO. It ain't cheap at $600 a night, but isolation, a luxury treehouse, and UFOs should never come cheap.