In 2010, a group of environmentalists and geologists discovered that the underground river has a second floor, which means that there are small waterfalls inside the cave. They also found a cave dome measuring 300 m (98… See more

The park has a limestone karst mountain landscape. St. Pauls Underground River Cave is more than 24 kilometres (15 mi) long and contains an 8.2-kilometre-long (5.1 mi) underground section of the Cabayuga… See more

The park has a range of forest formations, the thirteen forest types found in tropical Asia, namely forest over ultramafic soils, forest over limestone soils, montane forest, freshwater swamp forest, lowland evergreen t… See more

Birds comprise the largest group of vertebrates found in the park. Of the 252 bird species known to occur in Palawan, a total of 165 species of birds were recorded in the park. This represents 67% of the total birds and al… See more

Puerto Princesa Underground River was entered as the Philippine entry – and topped the first round of voting – in the New 7 Wonders of Nature competition. On July 29, 2011, after the second round of voting, it was declar… See more