Phu Wiang National Park Khon Kaen places to travel Near the Chum Phae residence that covers an area of 380 square kilometers. In Wiang Kao District, Phu Wiang District, Si Chomphu District and Chum Phae District. No one had ever imagined that the plateau in present-day Thailand would have been home to dinosaurs before. In 1976, geologists discovered the remains of a bone. And when sent to French experts for research, it turned out to be a dinosaur’s left knee bone. From then on, explorers have been seriously excavating until the present.