The park’s territory lines Thailand-Cambodia border, over high cliff and lush forest of Dongrek Range. Khao Phra Wihan National Park acquires 130 square kilometres area of Amphoe Kantharalak of Si Sa Ket, Sub Amhoe Nam Khun and Amphoe Nam Yuen of Ubon Ratchathani. The country’s 83rd National Park was established on March 20, 1998. The park features dry evergreen forest, mixed dipterocarp forest, and deciduous dipterocarp forest. It is home to numerous wildlife which roams between two countries such as wild hog, deer, barking deer, rabbit, squirrel, gibbon, civet.