Mirrored tree house
This is a hotel in Sweden. here is another view : http://i.imgur.com/nk5Embx.jpg
The Mirrorcube is a simple hut in the trees, a lightweight aluminum structure mounted directly on the tree trunk of a tall pine. The entire volume, a 4x4x4 meter cube, is clad in highly reflective glass, the outside of which reflects the surroundings and the sky, creating a camouflaged place among the treetops. The interior is made of plywood and freely positioned windows open up to a 360 degrees view of the surroundings. The cabin offers a living for two people; a king size bed, a small kitchenette and bathroom, as well as a living room and a roof terrace. Access is via a rope ladder or a rope bridge attached to the adjacent trees. The project is realized entirely with local resources and craftsmanship from around Harads.
The Treehotel is run by Brittas Pensionat, which also manages the common service facilities that holds complementary functions; bath, sauna, and a planned chapel. The first five tree rooms were completed in 2010.
Source : http://www.architravel.com/architravel/building/tree-hotel-in-harads/