Covering an area of 4,000m² in which the main building occupies 420m², the castle is a unique construction work, which harmonizes the Oriental and Western architectural styles.

In front of its arched doors are earthen banks. Occupying a pivotal position overlooking the Bac Ha valley, the castle serves both as the residence of Hoang Yen Chao, then Hoang A Tuong and as a fortress. Its network of walls, bunkers, and battlements were reinforced by a mortar mixed with sugar molasses. In a distance, the white castle jutting out from the valley looks imposing and majestic.

At present, this castle is put under a restoration scheme to better help tourists get insight into the changes of the local life.