Spiral Island

Spiral Island was a floating artificial island in a lagoon near Puerto Aventuras, on the East coast of Mexico south of Cancún. It was built by British expatriate Richie (or "Reishee") Sowa beginning in 1998; he filled nets with empty discarded plastic bottles to support a structure of plywood and bamboo, on which he poured sand and planted numerous plants, including mangroves. The island sported a two-story house, a solar oven, a self-composting toilet, and three beaches. He used some 250,000 bottles for the 66-by-54-foot structure. (Wikipedia)

Playa del Carmen Community News and Info :: Reishee Sowa - a man and his island

(Fab tip from Travis. Thanks, TK!)