Phuenchapura
Phetchabun lies in the valley of the Pa Sak River, enclosed by the mountains of central Thailand. The river flows south through the long basin towards the Chao Phraya plain. Old city walls reflect Phetchabun's place on routes through the valley, where armies travelling from the north could approach the Siamese heartland. Farther south stood Si Thep, an ancient town whose monuments preserve the religious art of the Dvaravati and Khmer periods.