Is a high stone cliff. The office of Sri Nan national park is located here. In winter, you can see mists from the top of the cliff and when it lifts you can see the Nan River wending through the forest. A national flagpole has a lanyard running all the way down to the foot of the hill, the longest in the country; it is said to take 12 rounds of the national anthem before the flag is raised. There are camping areas for visitors in the park. Chu cliff is an excellent spot to see the sunrise; the route is around two kilometers. Near the top, there are many sharp stones so you must have sensible shoes for climbing. It takes about one hour for round trip. Anyone who wants to walk needs to contact the Park office.