Unjusanseong | 観光地情報 | K-Travel Mate

Unjusanseong, also known as Gosan Sanseong, is a Baekje period site located around Unjusan Mountain (459.7m above sea level), at the boundary of Jeondong-myeon Migok-ri, Cheongsong-ri, and Jeonui-myeon Donggyo-ri and Sinjeong-ri. It is a mountain fortress built using the terrain of Unjusan, boasting a grand scale with a circumference of approximately 3,210m, width of 2m, and height between 2 and 8m. The basin-shaped mountain terrain and beautiful natural scenery create outstanding ambiance. The stone walls maximize natural terrain: the north and east walls follow ridges extending west and south from Unjusan's summit, the south wall encloses a ridge, and the west wall crosses the western ridge. Overall, the northern area is higher in elevation, while southwest is lower. Gate sites exist at the west, south, and north gates but are mostly collapsed, making accurate forms difficult to determine. Unjusanseong consists of inner and outer fortress structures, making it an important resource for ancient mountain fortress studies. Inside are remains of gates, buildings, and wells, with a circular altar near the summit presumed for rain rituals. Baekje period pottery and roof tiles, along with Goryeo and Joseon period ceramics and tiles, have been excavated, showing historical traces over long years. After Baekje's fall in 660, the fortress was the last battleground of the Baekje Revival Movement led by Pungwang, Boksin, and General Dochim. At the entrance is Gosan Temple, and annually on the Saturday closest to the 8th day of the 9th lunar month, the Gosan Festival is held to honor King Uija of Baekje's downfall period, Pungwang of the revival period, and the spirits of those who sacrificed during the movement.