The Treehotel is a group of unusual tree houses in northern Sweden that guests can rent. All six sides of this one are mirrored, creating beautiful images as the sky and trees reflect on the surface. Others look like a bird's nest and a flying saucer.
Link -via My Modern Met | Official Website | Photo: Peter Lundstrom
I think it's sad that people assume that birds fly into the Mirrorcube. I can assure you that it does not happen, the birds see it as reflecting in the glass, we have also set up a thin film that birds can see. However, ordinary glass can be very difficult for birds to seefor birds to see
(Rhetorical, obvy.)