It is listed as a National Treasure of North Korea (#58).
The fortress dates from the era of the Koguryo Kingdom; the outer walls were reinforced during the Koryo Dynasty and the Joseon Dynasty.
The complex is built around the area of Mt.
The outer walls feature several arch-shaped gates in the east, west, south and north; a two-storied building located at the south gate was destroyed during the Japanese occupation of the area.
[1] The enclosed area inside the fortress has 13 ponds, 32 wells, as well as an armory, a food storehouse and barracks.