Posting whatever makes me click.
Inspired by a documentary film and a Swedish couple, architects came up with some impressive designs for a new retreat somewhere in rural Sweden by the name Treehotel (http://www.treehotel.se). And yes, the hotel is operational since July. The "Mirrorcube" shown in the picture is "a mirrored aluminium cube, reflecting the surrounding trees but coated with infrared film to make it visible to birds". Have a look at the rest of the designs also. It's worth it!