Palawan Underground River

Palawan’s Underground River: One of the 7 Wonders of Nature

Exploring Palawan Underground River Palawan Underground River is a true natural wonder of the world.  It’s the world’s longest navigable underground river and makes for an exciting experience in one of the Philippines’ most popular islands. Wait, underground river? How is that possible? Yep, that’s right. In fact, the river flows directly underneath the St…