The Puerto Princesa Subterranean River National Park (PPSRNP) is one of the most distinguished biodiversity conservation areas of the Philippines. It is known lush old growth tropical forest, interesting wildlife, pristine white sand beaches and unspoiled natural beauty. It features spectacular limestone formation that contains an Underground River that is reputed to be the longest navigable underground river in the World. It is one of the few such rivers which the public can easily experience and appreciate.

The Park is designated a core area for the Palawan Biosphere Reserve under the Man and Biosphere Program. In recognition of its globally significant natural properties, the PPSRNP was inscribed to the United Nations Educational, Scientific and Cultural Organization’s of (UNESCO) List of Natural World Heritage Sites. Inscription to the list confirms the exceptional and universal value of the Site that deserves to be protected for the benefit of all humanity.