Since 1974, the Sarawak government has limited access to the national park by not building any roads. This is to preserve the park's ecological integrity and its resources. Legislation such as National Parks and Nature Reserves Ordinance of 1998 and National Parks and Nature Reserves Regulations of 1999 had been enacted to regulate the management of the park. 90% of the park and 95% of the caves are closed to visitors except for research purposes. There are only four show caves opened to public: Clearwater Cave, Wind Cave, Deer Cave, and Lang's Cave. All visitors require a permit and a park guide. Visitors are required to organise into groups of ten with visiting intervals of 20 minutes at the four show caves. On the other hand, there are seven caves available for adventurous caving in groups of six if properly equipped. There is also a 480 metres skywalk through the canopy. Other activities that can be done here are rock climbing, kayaking and mountain biking.