The South zone is a little visited area South of the old walled town. The area is reached through the Namo gate (Pratu Namo) at the center of the Southern wall. The gate was fortified with a tower; in front of it are the remains of a structure that served as a guard post.
The South zone contains about a dozen ancient temples, in various states of preservation. The Wat Chetuphon is the largest temple of the South zone. Its most striking feature is a mandapa with four huge images of the Buddha in four different postures each facing a different direction.