[3] In 1996, the remains of Siamotyrannus isanensis, a new family of carnivorous thunder lizards, were unearthed in the park.

The area is characterized by a central plain and the low hills of the western Phu Phan Mountains.

[3] The general topography of the area is a mountain range, shaped as a hollow circle.

The outermost mountain range has a maximum peak of 844 meters above sea level.

Bird species include Black-crested bulbul, Lineated barbet, National bird of Thailand Siamese fireback, Eurasian jay, Common flameback, Green-billed malkoha, Rufescent prinia and Shikra.