Phu Wiang National Park

Phu Wiang National Park is a protected area in Phu Wiang District, Khon Kaen Province, northeastern Thailand, covering about 325 square kilometers of forested hills and sandstone plateaus. Established on 8 December 1991 as Thailand's 71st national park, it is notable as the site of Thailand's first dinosaur fossil discovery in 1976. The park preserves nine excavated fossil sites, viewpoints, waterfalls and nature trails, complemented by the nearby Phu Wiang Dinosaur Museum.

Visitors can explore forested sandstone mountains, marked nature trails and nine documented dinosaur excavation sites with in-situ fossil replicas and interpretive signs. The park offers viewpoints such as Chom Tawan Cliff, seasonal waterfalls including Tat Fa Waterfall, a visitor centre and campsites. The main paleontological exhibits are housed in the nearby Phu Wiang Dinosaur Museum. Terrain is hilly with dirt trails and steps between sites.

Thailand's first dinosaur fossils were discovered in the Phu Wiang area in 1976 by geologist Sudham Yaemniyom, later identified as sauropod remains. Subsequent excavations by the Department of Mineral Resources and Thai-French teams uncovered multiple sites dating to the Early Cretaceous Sao Khua Formation. The area was declared Phu Wiang National Park on 8 December 1991 to protect the fossil sites and forest, covering 325 sq km across Phu Wiang and Wiang Kao Districts.

The park is a major paleontological and educational site for northeastern Thailand (Isan), supporting research, conservation and public education on dinosaurs through its fossil sites and the Phu Wiang Dinosaur Museum, which is an important learning resource for local communities and visitors.