This site is in two parts, one each side of Vinh Loc village in the province of Thanh Hoa. The Citadel is almost a kilometer square surrounded by earth and masonry walls. In the centre of each side are masonry arched gateways. The area within the walls is now rice padi.

The Nam Giao altar resides on a hillside at the other end of the village.

Vinh Loc is accessible by bus from Thanh Hoa town.