National Geological Monument

The Puerto Princesa Subterranean River National Park (PPSRNP) was officially declared a National Geological Monument on December 4, 2003 by the National Committee on Geological Sciences (NCGS). This recognition was conferred in acknowledgment of the park’s outstanding scientific importance, particularly its value as a permanent natural laboratory for the study of geological processes.

The park’s extensive limestone karst formations, cave systems, and subterranean river provide exceptional opportunities for research on speleology, geomorphology, hydrology, and other earth science disciplines. Its geological features are considered unique and of high scientific value, offering insights into the evolution of karst landscapes and natural processes over millions of years. The declaration further emphasizes the need to protect and preserve PPSRNP, not only for its ecological and aesthetic significance but also for its continuing contribution to scientific knowledge and education.