Inscribed by UNESCO as a World Heritage Site on December 4, 1999, Palawan subterranean river (St. Paul Underground river) is the longest underground river, it stretches for about 8.2 kilometers underground. It features a stunning limestone karst mountain landscape and has been nominated for the "New Seven Wonders of Nature" competition.
Located about 50 kilometers north of the city of Puerto Princesa, Palawan, Philippines. The National Park is located in the Saint Paul Mountain Range on the northern coast of the island. It is bordered by St. Paul Bay to the north and the Babuyan River to the east.
