Palawan Underground River

Palawan Underground River

DID YOU KNOW THAT . . . The world's longest underground river system accessible to human can be found in Palawan, Philippines. Recently named as one of the New Seven Wonders of Nature, the Palawan Underground River is about 8.2 kilometers of navigable river. Tourists, however, are only permitted to navigate 1.2 kilometers of it.

Photo credit: www.buyanihan.com