Declared as a National Park on 1 June 1987, this 687 square kilometers park is where the borders of Thailand, Laos and Cambodia are met. The superb view of the three countries can be seen from the Pha Pheung cliff where visitors are recommended to take hiking trails leads to the high plateau. Interesting attractions include; the 40-meter Bak Tew Yai waterfall which located approximately 4 kilometers from the park office; the Rock Formations at Phlan Yew; and, a group of springs in the forest at Bo Nam Sap.