Wayward wonders: The Crooked House and the Dancing House -- All afloat that's going afloat: Floating Houses -- Every day is Arbor Day: The World's Largest Tree House -- People in rock houses shouldn't throw glasses: Rock houses and villages -- One twisted building: Dynamic Tower -- Shell shock! The Nautilus House and the Conch Shell House -- Cutting corners: Waldspirale -- Home on the strange: Haines Shoe House and Dog Bark Park Inn -- Living in a tree ornament: Free Spirit Spheres -- Rock steady: Ideal Palace -- Underground digs: Subterranean Dwellings -- Stone, sweet stone: House of Stone and Joshua Tree Boulder House -- Off the deep end: Marina Bay Sands Hotel.