Palawan
Palawan has one of the world's most spectacular marine environments with some of the most extensive coral reefs in the country. Coron Bay has seven lakes surrounded by craggy limestone cliffs that attract nature lovers. It is famous for its astonishing variety of wreck diving as it has 12 sunken World War II Japanese warships, and is listed as one of the world's top ten scuba sites.
Numerous conservation efforts are underway to protect the local environment around Palawan. The 332 km² Tubbataha Reef Marine Park and the 96,000 hectares of El Nido Marine Reserve Park boast diverse ecosystems with rainforest, mangroves, white sand beaches, coral reefs, and limestone cliffs. A high density of marine species, with manta rays being a common encounter, divers may see one of the world's rarest marine mammals, the sea cow. The Malampaya Sound Land and Seascape Protected Area is an important ecological zone and it's watershed is home to the Bottle-nosed dolphin.
Puerto Princesa Subterranean River National Park is a UNESCO World Heritage site. At 8.2km, it is reputed to have the world's longest navigable underground river. It contains significant habitat for biodiversity conservation, a full 'mountain-to-sea' ecosystem and has some of the most important forests in Asia.