Mulu National Park

Gunung Mulu National Park is one of Malaysia's most astounding geographical sites in Sarawak’s expanding network of parks. It is also the country's largest national park, covering 544 square kilometers of primary rainforest; criss-crossed by fast flowing rivers and clear jungle streams. Mulu is dominated by three mountains – Gunung Mulu (2,376 m), Gunung Api (1,750 m) and Gunung Benarat (1,858 m), yet many of Mulu’s greatest attractions lie deep below the surface. Hidden underneath the forested slopes is the world's largest limestone cave chamber by surface area, as well as one of the largest cave passages on Earth – a breath-taking natural wonder, containing a number of record breaking caves. There are four show caves in Mulu, selected for their uniqueness and sheer beauty. They can all be visited through day trips from the park headquarters and are accessible by boardwalks and well-lit concrete paths.

For the more adventurous, try the challenging Pinnacles trek, or follow the Headhunters' Trail – named after the Kayan war parties that walked the same path. If you are looking for a more physical yet breathtaking Borneo experience, this UNESCO World Heritage Site is a must.