This house has been sitting on a rock in Serbia for over 45 years. Though it may not be an ideal location to live in, it's a perfect resting spot for swimmers of the lake who need a place to rest comfortably. It was first conceptualized in 1968 by a group of young swimmers and finally erected the following year as a one-room home. It's remarkable to think that it has managed to balance itself in place all these years, surviving gusting winds and the potential dangers of water damage.