is located at Tambon Khao Chakan, next to Wat Tham Khao Chakan, 17 kilometres from Amphoe Mueang Sa Kaeo along Highway No. 317 (Sa Kaeo-Chanthaburi) between Km. 131- 132, on the left turn. It is a limestone mountain whose ridge is 90 degrees against the north and the south. Its summit is 240 metres above sea level. It comprises 3 mountains lining up. Khao Chakan is the largest and stands in the middle between Phukhao Ming on the left and Khao Falami on the right. The three mountains are established as the Khao Chakan Arboretum under the supervision of the Department of National Park, Wildlife and Flora. The Arboretum is a residence of wild monkeys, as well as, millions of bats flying in a long line in the evening. At the foot of the hill stands a temple called Wat Tham Khao Chakan.This place opens daily from 8.00 a.m.- 5.00 p.m. and it is free of charge. For more information please contact 0 3731 2282 or 0 3731 2284.