Recreación virtual de las viviendas flotantes del grupo Boxx. Looks like a project destined for Palma de Mallorca. Not sure if it was ever built.
Not double decker, but you get the idea
Dubai's 'Floating Seahorse' Homes Are Partially Submerged And Totally Futuristic
This new Floating Hotel with Catamaran Apartments aims at promoting low-impact tourism on inland waters. Consisting of small, floating catamarans, the floating hotel is a perfect solution for tourism without harming the natural environment.
Alex Chinnek art
Revolutionary Ocean Skyscraper Designed for Research - My Modern Metropolis
Klymit's signature body-mapping technology and strategically placed non-slip zones hold the insulated Hammock V pad in place while you sleep. #affiliate
awesome This modern retreat is as an ideal place take in some fresh mountain air and unw... by http://www.danaz-home-decor-ideas.xyz/modern-home-design/this-modern-retreat-is-as-an-ideal-place-take-in-some-fresh-mountain-air-and-unw/