The Puerto-Princesa Subterranean River National Park, comprising 22,202 ha and covering three barangays, encompasses the natural values of the property and is of adequate size to protect all the various landforms and the estuarine ecosystem that conveys the Outstanding Universal Value of the property. The boundaries of the property cover the entire watershed of the underground river, thus protecting water quality and quantity and ensuring the long-term viability of the outstanding natural values contained within the property. The biodiversity values of the property are highlighted in Barangay Marufinas which is included in the property along with the adjacent barangays which also contain significant biodiversity values and habitats important to their integrity. Management guidelines are needed to address threats to the property including pollutants impacting on water quality in the underground river. Threats to the property are mainly from adverse activities in adjacent catchment areas, primarily forest clearing and agricultural activities. Tourism activities require careful planning and management to ensure the natural values are not impacted.