Seoul Yangcheon Ancient Fortress Site

Yangcheon Ancient Fortress Site is a ridge-top fortress built by encircling the main ridge and branch ridges of the summit of Gungsan Mountain in Gayang-dong, Gangseo-gu, Seoul. Gungsan Mountain is located at the confluence of Anyangcheon Stream and the Han River, serving as an important strategic point for defending the lower Han River. The fortress features steep slopes toward the Han River to the north and gentle slopes to the south, with a length of approximately 220m and an area of 29,370㎡. Records of the fortress remain in various historical documents such as *Sinjeung Dongguk Yeoji Seungnam*, *Yeoji Doseo*, and *Daedongjiji*, and traces of the fortress walls, including foundation stones and wall stones, can still be identified. It is said that during the Imjin War, General Gwon Yul stayed here before crossing the Han River to achieve victory at Haengju Fortress. Along with Haengju Fortress and Odu Fortress, it holds significant importance as a key defensive stronghold for the Han River.