Spiral Island

Soda Bottle Island

Other people build houses on land. Richart Sowa, a carpenter and former British rock-band guitarist, has designed and constructed a whole island. This self-sustaining environment for living, about 20 meters (66 feet) in diameter, floats just off Isla Mujeres, Mexico, on 115,000 empty plastic one-liter soda bottles anchored by 11 concrete-filled car tires. When...