Posts Tagged: puerto princesa
PPUR: Longest underground river system
The world’s longest underground river system accessible to man can be found at the St. Paul National Park in the province of Palawan. It is 8 kilometers long. (Photo: OP-PCSD)
PPUR: Longest underground river system
The world’s longest underground river system accessible to man can be found at the St. Paul National Park in the province of Palawan. It is 8 kilometers long. (Photo: OP-PCSD)