Underground River
7:03 PMUnderground River, Sabang, Palawan { Photo Credit: MarkAngelo - Source} |
Puerto Princesa Underground River (PPUR), as you might have seen in my Grand Adventure Wish List is a national park with an 8.2 km subterranean river flowing directly into the sea within a limestone and karst mountain. It was nominated as one of the "New 7 Wonders of Nature", known to be the world's longest underground river. 4 kilometer of it is navigable. However only 1.5 km of it is commercially accessible from the sea and a special permit is required to access the rest of it.