Chiang Saen Ancient City

Chiang Saen Ancient City is a walled archaeological site in Wiang Subdistrict, Chiang Saen District, Chiang Rai Province, on the Mekong River near the Golden Triangle. Founded in 1328 as a Lanna Kingdom center, it retains brick city walls, moats, gates and numerous temple ruins such as Wat Pa Sak. The site preserves Lanna and early Tai Yuan architecture and offers insight into northern Thailand's early urban and Buddhist history.

Visitors can explore a historic walled town on the Mekong River with well-preserved brick walls, moats and gates enclosing scattered temple ruins, chedis and Buddha images. The setting is a low-lying riverside plain with quiet streets, ancient brick structures, and open grounds. Visitors can walk or cycle along the walls, visit restored temples like Wat Pa Sak and Wat Phra That Chom Kitti, view the Mekong River, and visit the nearby Chiang Saen National Museum.