Puerto Princesa Subterranean River National Park, Palawan

Puerto Princesa Subterranean River National Park, Palawan

Puerto Princesa Subterranean River Photo by Carrie Kellenberger via Flickr.

Palawan seems to never run dry of amazing destinations for tourists. The Puerto Princesa Subterranean River National Park also called Puerto Princesa Underground River is a UNESCO World Heritage Site and one of the New 7 Wonders of Nature. The 8.2 km long Underground River is said to be the longest navigable underground river in the world. The cave system contains stalactites, stalagmites, small underground waterfalls, and more river channels.