Something special: Mirrorcube, Sweden's 'invisible' hotel room Found in Harads, about 50 kilometres outside of the city of Lulea in northern Sweden, Treehotel is a hotel composed of five individually designed "treerooms," each of which was created in collaboration with leading Scandinavian architects. Standing at a height of between four and six metres above the ground and accessed via ramp, bridge or retractable stairs, accommodation options include "The Bird's Nest," which, as you can probably guess, resembles a giant bird's nest. "The UFO" resembles the flying saucers shown in old sci-fi movies and "The Cabin" is a spacious shed wedged between tree trunks. The most distinctive room, however, is "The Mirrorcube." Designed by Tham & Videgard architects, it is a genuine hideaway. Measuring 4x4x4 metres, the cube is clad in mirros that reflect their surroundings and conceal the manmade abode from the natural landscape that envelops it. It works surprisingly well but that success has also presented problems. With the cube rendered almost unnoticeable from certain angles, its designers had to conceive a way to prevent birds from flying into it. Their solution: to cover the walls with infrared film which is invisible to humans but highly visible to birds. From outside the room is a marvel, but those who get to stay there should also be impressed. It contains a large bed, bathroom, lounge, rooftop terrace and six bedrooms from which to admire the view. Beyond its walls, guests can retreat to nearby Britta's Pensionat to dine in an authentic 1930s-1950s setting, and Treehotel also features a rbar, sauna and relaxation area. You can see more of Treehotel's unique accommdation options in our gallery; for a look at other unusual treehouses, see our gallery showing fairytale treehouses around the world. All images: www.treehotel.se; summer shots by Peter Lundstrom, winter shots by Prederik Broman