Stretching eight kilometers, the Puerto Princesa Subterranean River Natural Park is regarded as the World's longest underground river located underneath St. Paul Mountain Range. It is a passage through formations of limestone rocks including a huge cathedral- like cavern. To experience this UNESCO World Heritage Site, hop aboard an outrigger boat for a tour equipped with light and nature's wonders - seldom seen and untouched by the sun. At the park's jungle trail, enjoy an encounter with the wilderness made famous by long-tailed monkeys, monitor lizards, wild Palawan pigs, Tabon birds, hornbills, and other fauna.