Sai Thong National Park is 70 kilometers west of Chaiyaphum City and comprises 319 square kilometers in Nong Bua Daeng, Nong Bua Rawe, Thepsathit and Phakdi Chumphon of Chiayaphum Province.
The vegetation ecosystem is Deciduous Dipterocarp in the south area of the National Park and Dry Evergreen Forest along the streams and summits with water. On the steep slopes of the north and west portions of the Park are Deciduous Dipterocarp and Mixed Deciduous Forests and Bamboos.
Pha Hum Huet a frequently photographed viewpoint in the park, providing cliff-edge views over the surrounding landscape. The Bua Sawan flower field covers the western ridge of Khao Phang Hoei peak and, from June to August each year a large pool upstream feeds the falls and provides a swimming area. At the front of the waterfall is a large basin for swimmers called Wang Sai. Also, above the waterfall is a deep body of water called Wang Ngueak whose water runs along the crooked and steep