Floating Island

I was watching German TV at the gym last night and happened to catch a piece on Spiral Island, a man-made island that floats on a quarter of a million plastic bottles.
From the wiki:
"Spiral Island I was a floating artificial island in a lagoon near Puerto Aventuras, on the Caribbean coast of Mexico south of Cancún. It was built by British eco-pioneer Richart (or "Rishi") 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. It was destroyed by Hurricane Emily in 2005.[1] Sowa has built a new Spiral Island II in Isla Mujeres, Mexico.
The original island sported a two-story house, a solar oven, a self-composting toilet, and three beaches. He used some 250,000 bottles for the 66ft (20 m) by 54 ft (16 m) structure. The mangroves were planted to help keep the island cool, and some of them rose up to 15 ft (5 m) high."
It was also featured on Ripley's Believe It Or Not:

Pretty neat, eh?