The city wall is located in the center of the historical park in Tambon Muang Kao and surrounded by earthen ramparts. The north and the south walls are each 2,000 metres long, where as the east and the west walls are each 1,600 metres long. The walls contain four main gates: Sanluang on the north, Namo on the south, Kamphaenghak on the east, and Oar on the west.