Propeller Island Hotel ~ Berlin, Germany Is it an art exhibit? Is it a hotel? Who the hell knows. This “habitable work of art,” bills itself as “A Vision Machine Museum to Stay Overnight,” because Germany. The rooms are all positively insane, and they’re all wildly different: in one, the bed is suspended midair on a pulley system, another replaces the notion of beds entirely with twin human-sized cages, another boasts a circular bed that spins when you press a pedal.