Designed by the Stockholm-based firm Tham & Videgård Arkitekter (creators of many a cool architectural concepts), the Mirrorcube features reflective external surfaces. The smooth exterior of the cube-shaped structure is extremely difficult to detect in the middle of a thick forest—especially in the arctic rays of Lapland, northern Sweden, where the light can play tricks on your eyes even when there aren’t mirrored buildings about.
The Mirrorcube is suspended above the ground on wires strung from four trees and is reached by way of a (thankfully visible) rope bridge. By the time the entire Treehotel complex is complete—it opened in the summer of 2010 and construction is ongoing—it will feature a second invisible-esque treehouse abode; it will be reached via a rope ladder
via: Spot Cool Stuff