Fort Chao Chan A laterite fortress built on a mound in the middle of the moat on the south side Match the door The fort has a square layout. 15.00 meters on each side. There is only one entrance-exit in the middle of the north wall that faces the door. Approximately 2.50 meters in width. Each inner wall of the fort has 1.40 meters wide in the turret wall. Assumed that it was a cannon port.