This mountain can be reached by taking Highway No. 227 for 30 kilometres, turn right to Wat Sakkawan 1 kilometre away. Phu Kum Khao has the largest concentration of dinosaur fossils in Thailand. Numerous fossils were found in rock layers. The Department of Mineral Resources has excavated some areas where entire skeletons are now clearly visible. Most are Sauropods, large, long-necked, plant-eating dinosaurs which lived about 130 million years ago.