The Puerto Princesa Underground River is located about 50 km north of the city of Puerto Princesa, Palawan, Philippines. It features a limestone karst mountain landscape with an 8.2 km. navigable underground river. A distinguishing feature of the river is that it winds through a cave before flowing directly into the South China Sea. It includes major formations of stalactites and stalagmites, and several large chambers. The lower portion of the river is subject to tidal influences. The underground river is reputed to be the world’s longest. At the mouth of the cave, a clear lagoon is framed by ancient trees growing right to the water’s edge. Monkeys, large monitor lizards, and squirrels find their niche on the beach near the cave.
Tubataha Reefs Natural Park is home to some of the most beautiful coral reefs in the world. Rising from the volcanic depths of the Sulu Sea in the western Philippines, these magnificent atolls encompass an astonishing diversity of marine life.
It is home to nearly 400 species of fish and bird species, enough reason to declare Tubbataha as a National Marine Park through Proclamation No. 306 on August 11, 1998 this makes commercial fishing or the collecting of corals illegal within 33,2000 hectares of its reefs and surrounding areas.