This national park always reminds tourists about dinosaurs. Indeed, nobody had formerly ever though the Isan plateau was once home of dinosaurs. Until 1976 when a uranium survey team discovered a piece of fossil, which was examined by French specialists and declared that it was a left knee bone of a dinosaur. After that, serious execration has never ended until now. On the hill Pratu Ti Ma, which was the first site, geologists have found fossils of a dinosaur, 15 metres high with a long neck and tail.
This is a kind of plant-eating dinosaur never found else where before, so it was named Phuwiangosaurus Sirindhornae to honour H.R.H Princess Maha Chakri Sirindhorn. In this site, over ten teeth of a meat-eating dinosaur have also been found. So geologists and scientists presumed that the long-necked dinosaur was prey for these teeths owner. Among these teeths, one is different. After a study, scientist found that it belonged to a new species of dinosaur never found before. So it was named Siamosaurus Suteethorni after the discoverer, Mr. Warawuth Suteethorn.
All the three sites are not far from the headquarters, and tourists can also visit the second and third sites nearby.Fossils of Siamotyrannus Isanensis found here are the oldest ones, dating back 120-130 million years. This indicates that tyrannosaurus originated in Asia. These fossils are now displayed in the museum of the Department of Mineral Resources.At the 8th site, there are 68 footprints of dinosaurs, dating back 140 million years ago.