Gunung Mulu National Park is justifiably famous for its limestone karst formations, some of the most spectacular caves on earth. Mulu is home to world’s largest underground chamber (the Sarawak Chamber), the world’s largest cave passage (Deer Cave) and the longest cave in Southeast Asia (Clearwater Cave). Listed as a World Heritage Site in 2000, the park is dominated by three mountains – Mulu, Api and Benarat – and covers 52,000 hectares of primary rainforest.
The first scientific expedition to Mulu took place in 1977/8 when the UK’s Royal Geographical Society sent a team to Sarawak. To date there have been 22 caving expeditions to Mulu National Park to uncover its hidden secrets. To learn more about the caves, how they were formed and the various expeditions see the Mulu Caves Project, an excellent site maintained by leaders of past and present expeditions.
Four “show caves” can be visited as day trips from the park HQ. These are accessed by jungle trails, plank walkways or pathways through the caves. The Mulu experience is not confined solely to its caverns. The park’s biodiversity is as impressive as its cave system with Mulu containing 15 different types of forest – including mixed dipterocarp, heath, peat swamp, moss forest and montane vegetation – and thousands of species of ferns, fungi, mosses and flowering plants.
Mulu is also home to a wide variety of mammals, reptiles, birds, amphibians, fish and insects and other invertebrates. In addition to the show caves there are a number of jungle trails and adventure treks that enable visitors to experience the rainforest. These include the Gunung Mulu Summit Trek, the climb to see the Pinnacles of Gunung Api and the Headhunters’ Trail which combines river travel, trekking and a stay in a longhouse.
There is good selection of accommodation at Mulu ranging from guest houses, park accommodation to a luxury hotel. The Park HQ offers hostel and longhouse rooms (both with fan) and air-con, chalet-style units (deluxe garden bungalows or rainforest lodges). There are budget guest houses near the HQ and the Mulu Marriott Resort & Spa is located 10 minutes from the park.
Borneo Adventure offers a selection of 2, 3, 4 and 5-day Mulu tour packages.