Mountains and rivers
Because of movements in sedimentary rocklayers during the Ice Ages the highest mountain ranges were formed in the inlands. The highest is roughly located in a north-south line from Sabah to the heart of Borneo, where it splits. Most peaks are lower than 1500 meters, but the black-granite Kinabalu in Sabah with it's 4100 meters is the highest point in Southeastern Asia. In West-Kalimantan are the remarkable, almost vertical, limestone formations. Because of the rough and spooky look, the population thinks that spirits house here. The Mulu is the highest point in Sarawak with 2377 meters.