This is a favorite wreck dive for many Colombo divers. The Thermopylae Sierra is a 155 meter/509 feet long Cypriot shipwreck which sank during a monsoon storm in 2012 after being anchored for 3 years during a legal battle.
Port City Colombo is looking at investment opportunities through marine tourism with the growth of coral reefs along its 3.7 km-long artificial breakwater.