The park is at the boundary of the Dong Phaya Yen Mountains and the Khorat Plateau. The steep cliff at the 846 m high Sut Phan Din viewpoint affords a view into a valley of the Sonthi River and the Sap Langka Wildlife Sanctuary. The name Sut Phan Din (สุดแผ่นดิน) means end of land, reflecting the steepness of the cliff. This cliff also marks the watershed between the Chao Phraya and the Mekong rivers.