Khao Phra Wihan National Park
Khao Phra Wihan National Park is a protected area in Kantharalak District, Sisaket Province, northeastern Thailand, covering about 130 sq km of the Dangrek mountain range. Established on 20 March 1998 as Thailand's 83rd national park, it is known for its sandstone cliffs, forested plateau, seasonal waterfalls and ancient Khmer ruins. Its main visitor area is the Pha Mo E Daeng cliff viewpoint.