The Puerto Princesa Subterranean River National Park (PPSRNP) covers not only the world-famous Palawan Underground River but also the 'sleeping dragon' mountain, pristine forests, limestone karst landscapes, mangroves and white sand beaches.
The gate in the picture is the only physical barrier at the Iwahig Prison and Penal Farm in Puerto Princesa. Other than this structure, you could see no fences or barbed wires that would secure the perimeter of the 38,000 ha. facility.
The chaolangan in Puerto Princesa could be one of the most enduring legacy of the Vietnamese refugees. They are the 'boat people' who once sought and then found a temporary (which became permanent later on) home in Palawan.