9. The Propeller Island City Lodge Hotel - The Propeller Island City Lodge Hotel in Berlin has 31 rooms and each one is different. One guestroom is completely covered with mirrors, another has bed, table, chairs and a light glued to the ceiling. A third offers a nine-foot-square cell with a prison bunk and an escape hatch. For a good rest, some guests try a pair of his and her coffins. (Photo: Getty Images)