page_title: Gunung Mulu National Park
section_title: Geography
hierarchical_section_title: Gunung Mulu National Park / Geography
caption_attribution_description: Pinnacles at Mulu, Gunung Mulu National Park, Borneo
context_page_description: The Gunung Mulu National Park is a national park in Miri Division, Sarawak, Malaysia. It is a UNESCO World Heritage Site that encompasses caves and karst formations in a mountainous equatorial rainforest setting. The park is famous for its caves and the expeditions that have been mounted to explore them and their surrounding rainforest, most notably the Royal Geographical Society Expedition of 1977–1978, which saw over 100 scientists in the field for 15 months. This initiated a series of over 20 expeditions now named the Mulu Caves Project.
  The national park is named after Mount Mulu, the second highest mountain in Sarawak.
context_section_description: Gunung Mulu National Park is the most studied tropical karst area in the world. It has 295 km of explored caves which houses millions of bats and swiftlets. The national park is located at 100 km (330,000 ft) from Brunei, lies between the headwaters of Tutoh river and Mendalam river where the latter is a tributary of the Limbang River. The western side of the park are lowland area (38% of the park) and the eastern side are the mountain ranges consists of limestone and sandstone. The landforms in the park consists of rugged summits, steep ridges and escarpments, sheer cliffs, gorges, karst towers, caves and terraces, hot springs, floodplains and waterfalls.
  The park is dominated by three mountains: Mount Mulu [2,376 m (7,795 ft)], Mount Api [1,750 m (5,740 ft)], and Mount Benarat [1,858 m (6,096 ft)]. Mount Mulu is a sandstone mountain; meanwhile, Mount Api and Mount Benarat are limestone mountains. The summit of Mount Mulu is covered by moss forests, while the limestone pinnacles are found on the upper part of the Mount Api. The Melinau Gorge separates Mount Benarat from Mount Api. Meanwhile, Mount Buda is separated from Mount Benarat by Medalem Gorge. Mount Buda is included in another national park named Gunung Buda.
  The national park has three notable caves: Sarawak Chamber, one of the world's largest underground chambers, Deer Cave, the largest cave passage in the world, and Clearwater Cave, the longest cave system in Southeast Asia. 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). Meanwhile, the Deer Cave is at 120 m (390 ft) to 150 m (490 ft) in diameter. As of October 2018, Clearwater Cave has 227.2 km (745,000 ft) of explored passages.
  Other caves in this area are Gua Nasib Bagus, Benarat Cavern, and Cave of the Winds.
caption: The limestone pinnacles of Mount Api.
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