Mt. Kinabalu
This is the highest mountain in Borneo, Mt. Kinabalu is a mecca for tourists to climb. A bit of a cash grabber with guides, permits, lodging, etc, but people seem to come back tired but happy. The climb seems to involve a first day where you get to the midtpoint, and stay overnight. Then you get up at 1 am and climb to the top to see the morning sunrise. I'll pass on that one.
We rented a motorbike to see the mountain and hike a few trails at the base. A bit disappointing, but a beautiful trip there. You go from sea level to 1200 meters, so quite a climb on a small bike. we had planned on a 3-4 hours, but with an added trip to the hot springs, it turned out to be at least 8. We were so tired and sore when we got back!