The national park has three notable caves: Sarawak Chamber, one of the world's largest underground chambers,[16] Deer Cave, the largest cave passage in the world,[17] and Clearwater Cave, the longest cave system in Southeast Asia.[18][19] The Sarawak Chamber is 600 m (2,000 ft) long, 415 m (1,362 ft) wide and at least 80 m (260 ft) high, yielding a volume of 12,000,000 m3 (420,000,000 cu ft) and an unsupported roof span of 300 m (980 ft).