The park is situated at Rawis, Brgy. Guirang, Basey, Samar covering an approximate area of 840 hectares. Fascinating geological features abound in the area of the national park such as caves, hugs, limestone boulders, rockholes, weathered formation rocks and underground rivers.
The most prominent assemblage in the park is the cathedral-like caves, which are the Panhulugan I, and II, Sohoton and Bugosan. All the caves in the park are endogen caves in angular limestone cliff, which support the base of other crack system. It abounds with flowstones and dripstones. Two and a half (2½) hours motorboat ride from Tacloban City and two (2) hours ride from Basey proper can reach these tourist spots in Basey