Climbing Mt. Santubong is a great thing to do if you feel like doing 'something active'. The mountain isn't particularly high, only 810 m, but you have to scale all 810 metres since you start at sea level. There are several starting points at the base, but as you ascend, the trails merge into one. At first, it's just a modest ascent, but then steep sections with roots come up. Fixed ropes are available, to pull yourself up over the biggest steps. Then, some modest up-down-and-more-up trail through the jungle before the real fun starts. Vertical jungle has to be climbed with the use of fixed rope ladders and exposed roots. None of the sections are particularly high or dangerous, but they just keep coming. The ascent will take about 3 to 5 hours and the descent about the same - it takes longer time to climb down rope ladders than up. Surprisingly, the view isn't as pretty as you might expect, but the adventurous journey is totally worth it.