Thermopylae Sierra is a wreck dive site located 23 meters below the surface of the water off the coast of Lunawa, Sri Lanka. The ship is a former Cypriot vessel that sank in 2012, having deteriorated due to lack of maintenance.
Over the year, the 165-meter-long/540-foot-long ship has become home to many species of marine animals. Barracudas, parrotfish, surgeonfish, snappers, and octopuses can be seen on or around the ship. Whale sharks have also been occasionally spotted in the area.