Located in a 22,000 hectare area north of Puerto Princesa City in the island province of Palawan, the underground river is situated within the Puerto Princesa Subterranean River National Park which was formerly called St. Paul Subterranean River Natioanl Park. The park is considered one of the most biologically diversified conservation areas in the Philippines. Recently proclaimed as a National Geological Monument, it has been in the UNESCO World Heritage list since 1995. It is managed by the City Government.

Lying beneath the St. Paul's mountain, the underground river has an approximate length of 8 kilometers. Its opening is a spectacular lagoon in the South China Sea. For a more interesting visit, the park has a visitor center for briefing on the history, flora and fauna of the park. The center also contains a minimuseum featuring the culture of the indigenous people of the province.

The best time to visit the park is during the dry months from January to May. You can take-off from Manila, Cebu, or Iloilo City through airlines or shipping lines that have flights or voyages to Puerto Princesa City, the provincial capital. From there, take a public jeepney or a van to the park. Since the park enforces a "NO PERMIT, NO ENTRY" policy, it is required to register at the Park Information and Booking Office or at the Visitor Center.

The clear blue water along the shoreline of the park is ideal for swimming and snorkeling. Its forested mountains is good for jungle trekking. Wildlife abounds: birds of different kinds, lizards, macaques, squirrels, and more. See mangrove forests in their most natural setting. Be able to explore the caves and observe thousands of bats that roost there.