Phu Wiang National Park (PWNP) is located in Phu Wiang District, Khon Kaen Province, northeastern Thailand. It is best known for its numerous dinosaur bone archaeological sites,[1] The park is one of the world's largest dinosaur graveyards.[2] In 1996, the remains of Siamotyrannus isanensis, a new family of carnivorous thunder lizards, were unearthed in the park. The Phu Wiang Dinosaur Museum is situated within the park and displays many of the park's finds. The park, measuring 325 square kilometres (125 sq mi) in size, is located approximately 85 kilometres (53 mi) northwest of Khon Kaen. The area is characterized by a central plain and low hills.[2]