Creating the Icehotel is something of an art form; each year, ice from the frozen Torne River must be extracted and stored in a large warehouse with sub-zero temperatures. Then, artists from all over the world arrive and showcase their work in 19 individually-designed suites. Since the hotel melts each spring, no two years are the same.Sleeping in a room with no windows, constructed entirely from ice and snow is a unique, other-worldly experience. Rooms available from £196.