The island of Pulau Semakau, off the coast of Singapore, originally dedicated to fishin, was turned into a landfill in 1999. But the dump was constructed in such a way that leachate could be closely monitored and prevented from contaminating the surrounding water.

The island has since been made into an eco-park, and a marine habitat is now alive and well off the coast, complete with thriving coral reefs and mangroves.