Ancient City of Si Mahosot

The Ancient City of Si Mahosot is a large Dvaravati-period archaeological site in Khok Thai Subdistrict, Si Mahosot District, Prachinburi Province, eastern Thailand. Enclosed by an oval earthen rampart and moat covering about 700 rai, it was occupied from late prehistory through the Dvaravati period (approximately 6th to 11th century). The site contains remains of religious structures, ancient ponds including Sa Morakot, and traces of early urban planning, representing one of the most significant ancient settlements in the region.

Visitors can expect an open, low-lying archaeological landscape defined by a large oval moat and earthen embankments surrounding the ancient town area. Inside are scattered brick foundations, laterite remains, ancient ponds such as Sa Morakot and Sa Kaew, and religious ruins. The site is largely outdoors with grassy areas, trees and information signs. Exploration is on foot along paths and roads that cross the moated area, with views of rural surroundings and small shrines.