Treehotel

This unique hotel complex, devised by entrepreneur Kent Lindvall in 2010, has "rooms" built high in the canopy of a pine forest with gantries leading from one to the other. The "rooms", each designed by a different architect. Each room's unique theme is encapsulated in its name, such as "Mirrorcube", "Bird's Nest", "The Cabin", "7th Room", "The UFO", "Dragonfly", and "The Blue Cone", with all designs based on the ecological principle of sustainability.