Unusual Hotels - World

Have you ever slept in the cockpit of an old plane or in a train stationed on a bridge? How about spending the night in a see-through capsule stuck on the edge of a cliff, in a secret contemporary work of art, in an old church, or in a house sitting atop a water tower? Would you like to treat yourself to a night in an igloo, in a circus, in a futuristic tree house, in an underwater bedroom or at an open-air suite?