Sarawak attracts nature and adventure travellers. Its 124,967 sq km of rugged terrain, crisscrossed by rivers, peaks and caves, offers exciting travel experiences. The most popular destination is the Mulu National Park. Its cave systems is perhaps the most spectacular on earth.
The Sarawak Chamber is no accessible to visitors but four other are - Deer Cave, Lang's Cave Clearwater Cave and Cave of the Winds. They are all lit with electric( lighting and have paths but be prepared to cross some streams, climb over rocks and step over soft mounds of bat guano.

Deer Cave is the biggest passage yet mapped - 120m high and about the same width along its 1 km length. The trail inside cuts an underground stream to a 'Garden of Eden'.

Mulu National Park has an area of 544 sq km. It was opened to visitors only in 1985. The main attraction at the park is Mount Mulu, the second highest peak in Sarawak. It rises 2,376 metres above sea level.

A total of 26 major caves comprising 150 km of cave passages have been surveyed during the period when the park was subjected to explorations by expeditions. The largest is the Sarawak Chamber. At 600m long, 450m wide and 1 00m high it could easily house eight Boeing 747 aircraft lined up nose to tail with room for 32 more at the sides!
 

Close to the Deer Cave is Lang's Cave, a small but beautiful cave. An attraction here are the bats, which in the evening will emerge from the cave, thousands of them, to hunt for insects in the forest.
Clearwater Cave contains one of the world's major underground rivers, plus dry passages adding up to 100 km, making it the longest cave systems in southern Asia. Within this cave is Clearwater Spring, a pool which is suitable for swimming.

A few hundred metres down the river lies the Cave of the Winds. It has unusual calcite formations, including tall, slender stalagmites in the 'King's Room'.

mountains of Mulu are bedecked by razor-sharp pinnacles providing a challenge to anyone who dares to ascend it. The Pinnacles of Gunung Api is accessible via a 2hour boat ride, crossing some rapids along the way. Then a 3 to 4-hour trek takes you through forests to a park hut on the bank of the Melinau River where you rest for the night. Next morning you begin a 4-hour climb, up 1,000 metres via a steep path to a viewing point overlooking the Pinnacles. If the weather is good you get panoramic views of Brunei Darussalam and the South China Sea.

The park itself is a treasure trove of flora and fauna. Some 1,500 species of flowering plants including 170 species of orchids, 67 species of mammals, 262 species of birds, 47 species of fish and 282 species of butterflies had been recorded.

Getting there:

The fastest way to Mulu is by air from Miri, Limbang or Marudi. Or if you are looking for hard adventure, you may want the long arduous river journey but do check with your travel agency.