eazytraveler.net
Puerto Princesa Subterranean River National Park: A UNESCO World Heritage Site -
The Puerto Princesa Subterranean River National Park features a limestone karst mountain landscape with an 8.2 km. navigable underground river. A distinguishing feature of the river is that it winds through a cave before flowing directly into the South China Sea. It includes major formations of stalactites and stalagmites, and…