Puerto Princesa Subterranean River, Philippines
Photo Credit: John S Lander/LightRocket via Getty Images
The Puerto Princesa Subterranean River National Parks is one of the New Seven Wonders of Natures and a UNESCO World Heritage Site. It is located in a protected area of the Philipines, approximately 50 miles north of the city of Puerto Princesa, Palawan. In 2010, it was discovered that the subterranean river has a second floor which has led to the creation of several underground waterfalls flowing into the cave’s main entrance.
Inside of the cave, there is a 1,000-foot cave dome that is home to bats and full of natural rock formations. The underground river can be navigated by boats for only around 2.5 hours before the lack of oxygen becomes too dangerous.
