• 1. The Citadel (Rijswijk, The Netherlands)

    Architect Koen Olthuis of the Waterstudio Design Firm created this, the world’s first floating apartment complex, to be completed in December 2010. This image is a projection of the finished project, which will have 60 apartments, a parking garage, and a road that goes from one end of the complex to the other. When completed, the apartments will be part of a larger floating community of buildings. Go inside The Citadel!

  • 2. 727 Fuselage Home (Hotel Costa Verde in Manuel Antonio, Costa Rica)

    It’s a bird, it’s a plane, it’s…an airplane-shaped house? Actually, it’s Hotel Costa Verde’s refurbished 1965 Boeing 727-turned-suite. The two-bedroom unit includes a roomy porch built over the plane’s wing. You can rent the place—with its scenic ocean and jungle views—for $400 to $500 a night, depending on the season. Go inside the 727 Fuselage Home!

  • 3. Walking House (Copenhagen, Denmark)

    Danish artist collective, N55, created this abode for dwellers interested in pursuing “a nomadic, peaceful lifestyle.” It debuted in October 2008 and reportedly cost about $45,000 to build. The body of the house is built with steel plating, wood, and polycarbonate. It’s outfitted with solar panels and small windmills to provide energy. The house also features built-in rainwater collection. Designer Sam Kronick gave the Walking House this particular shape with hopes that someday many structures could be nestled together in a honeycomb-like formation. Go inside the Walking House!

  • 4. China House (Porcelain House in Tianjin, China)

    Businessman Zhang Lianzhi spent 20 years building a collection of antique porcelain goods. But, what to do with it all? Cover a 100-year-old house, that’s what! The facade took five years to, well, porcelainize‚ and the property is now valued at more than $60 million. The place has been open to the public since September 2007. Go inside the China House!

  • 5. The Steel House (Ransom Canyon, Texas)

    The late architectural sculptor Robert Bruno began the 23-year-long construction of his Steel House in 1974. He started the build primarily for the love of sculpting, but it didn’t take long to attract critics who called the home “weird” and “ugly.” Now, the structure—made of 110 tons of scrap steel that was welded together on-site—is a favorite stop for tourists and road-trippers. Go inside The Steel House! and See all of the houses from Wildest Houses V