The unprecedented drop in tourism revenues left UNESCO marine World Heritage sites struggling to keep rangers on the payroll, prevent rising illegal activity or continue crucial scientific monitoring.

Karst limestone formations flank the entrance to the Cabayugan River, which flows through a cave and into the sea in Puerto-Princesa Subterranean River Park. Next up is a national treasure ...

Here, island hoppers can swim in the exceptionally clear Kayangan Lake in Coron, tour the lagoons of Bacuit Bay in El Nido and kayak through caves on the Puerto Princesa Underground River.

Of the river's 5.1-mile length, 2.7 miles is navigable on a small boat tour. Entrance of the Puerto Princesa subterranean underground river. The journey to the river begins with a ride in a bangka ...

The Nomination files produced by the States Parties are published by the World Heritage Centre at its website and/or in working documents in order to ensure transparency, access to information and to ...