Donggo Mountain Fortress

The Mountain Fortress has a peculiar formation because it relies on the cliff of strange rocks of Seungamsan mountain, and in its west and north sides, it utilizes the appearance of the land embracing the valley in the shape of a straw basket. It also has wings to the south and the north. The structure of the mountain fortress is to have the ridgeline as an inside fortress, to set up an ambulatory road on the outer slope, and to build a stone wall outside of it. The height of the fortress wall is around 6m. The size of the fortress: the circumference of the outer fortress is 1,588.3m; the length of east and west axis is 314.0m; the length of the south and north axis is 256.0m; the length of the north wing is 112.0m; and the length of the south wing is 123.0m.