Fantastic way to upcycle plastic.
“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. Sowa has built a new Spiral Island II in Isla Mujeres, Mexico: