The terrace, as it is called, consists of two walls, an inner and outer wall. The inner is said to have been built first and that the outer was built later to replace the inner wall which was deteriorating and falling down. Reports suggest this terrace was used as ceremonial location or for cremations. The walls are separated by a trench allowing visitors to see both side which are heavily carved bas-reliefs of Apsaras and Buddhas. I found this very impressive and plan to spend more time exploring the features of the walls.