National Park Underground river in Puerto Princesa is located 50 km North from the town of Puerto Princesa on Palawan island. The Park occupies the ridge of St Paul in the Northern part of the island and is restricted to the Gulf of St. Paul and the river Babuyan in the East. Since 1992, the management of the Park is under the jurisdiction of the city administration. Unique underground river in Puerto Princesa was one of 28 finalists for the New Seven Wonders of Nature".

The landscape of the Park is represented by the limestone karst mountains, and the underground river for 8, 2 km available for navigation. A distinctive feature of Puerto Princess is her bed – she winds through the cave before falling straight into the South China sea. In the cave you can see the whole cluster of stalactites and stalagmites, and several huge underground halls. Before in 2007 in Mexico on the Yucatan Peninsula was discovered underground river, Puerto Princesa was considered the longest underground river in the world. In 1999, Puerto Princesa was listed as a world Natural Heritage site by UNESCO, due to its biodiversity and critical ecosystems.

National Park registered 8 of 13 forest types characteristic of tropical Asia, is a mountain forest, forests, freshwater marshy plains, tropical evergreen forests and mangroves, etc., Scientists have discovered more than 800 species of plants, including 295 species of trees.

A huge variety of different avian Kingdom of 252 species of birds that live on Palawan, 165 are found in the Park. 15 bird species are island endemics. Here you can see the blue-crested parrot, jungle chicken, Asian bird rhinoceros, Himalayan sea eagle, etc.

Among the animals of the Park are most often found long-tailed rhesus monkey, seeking their living on the shore during low tide, bearded pig, lions, polanskogo badger and porcupine. In the caves found bats, sarangani and spiders, and the waters of the Park – the sea cows, dugongs and marine turtles hawksbills. In total, the Park is home to about 30 species of mammals.

Every year the Park attracts thousands of tourists to see the unique river – trained guides arrange a 45-minute boat tours inside the caves. In addition, tourists can go on a real hike through the jungle – 5 km from the town of Sabang to Puerto Princess introduce the wonderful flora and fauna of the Park. Another option is to take a trip on a catamaran around the mangrove swamps, in which you can see what it looks like untouched forest, and even to plant a mangrove tree area. Fans caves like the Lion's Gate and the so-called Hole of Daylight, and lovers of mountain climbing is to climb the cliff Ugong, which offers stunning views. Finally, you can just relax on one of the many sandy beaches (some of the most popular beaches of Sabang, Panhuman and March Fe) or visit the ethnographic Museum to learn about the culture of the local aboriginal tribes.