The remains site is located in the mountainous region of Sap – Ba The in Thoai Son District, An Giang Province. It is a vast ancient vestige of the Phu Nam Kingdom, a powerful nation in the Southeast Asia about two thousand years ago. In the Middle Ages, the ancient citadel of Oc-Eo used to be a commercial center.
Oc-Eo Remains Site was rediscovered when the soil was dug out to build the Ba The Channel. The site is considered as “the Oc Eo city” with a surface area of 4,500 ha. There are still certain places in the Southwest like: Dong Thap Muoi, Chau Doc, Kien Giang which, until now, still hold many mysteries to researchers and archeologists.