If you do only one daytime trek in Danum Valley, this is the one — it combines culture, the valley's best view, and a swim into a single route.
The ancient burial site
Roughly two decades ago, a series of holes in a limestone cliff deep inside the conservation area were identified as an ancient burial site of the local Kadazandusun people. Hardwood coffins — carved from belian ironwood, a timber so dense it sinks in water and resists termites — were placed into the cliff face, some hundreds of years ago.
The location wasn't accidental: in local belief, the higher you were buried, the closer you were to heaven. Carrying these extremely heavy ironwood coffins up the cliff was itself an act of devotion. One of the coffins is said to be a chieftain's, buried with his blowpipe — which can still be seen inside — positioned so he could overlook the valley where his village once stood.
The climb
The trail climbs steadily from Borneo Rainforest Lodge, crossing a suspension bridge before ascending steep steps through primary forest. Expect 45 minutes to an hour of genuinely sweaty walking in high humidity — most reasonably fit visitors manage it, but it's the most demanding of the standard lodge treks. Leech socks and plenty of drinking water are essential.
The Viewpoint
Just beyond the burial site, the trail reaches the Viewpoint — the highest accessible point in the valley, with a sweeping panorama of the Danum River winding below, the lodge nestled among the trees, and unbroken primary forest stretching to the horizon in every direction. It's the single best photography spot in Danum Valley.
The Jacuzzi Pool
On the descent, the trail passes the Jacuzzi Pool — a shallow, clear natural pool in a jungle stream about 15 minutes from the lodge, perfect for cooling off before lunch. Bring your swimsuit and a quick-dry towel. The pool is home to small, harmless fish that will gently nibble at your skin — a free fish spa, as the guides like to say.
What: Guided trek to an ancient cliff burial site, panoramic viewpoint, and natural swimming pool. Time: Half a day, typically morning. Fitness: Moderate — steep steps, high humidity. Bring: Water, leech socks, swimwear, towel. Access: Guided only, from Borneo Rainforest Lodge.
Respecting the site
This is a genuine burial ground with continuing cultural significance. Stay on the boardwalk, don't touch or move the coffin wood, and follow your guide's lead — fragments of ironwood scattered around the site are part of its history, not souvenirs.