gomosanseong & seokhyeonseong
(고모산성 & 석현성)
In Northern Gyeongsang Province, between Sangju and the first gate of Mungyeong Saejae, stands the impressive Gomosanseong. Built by Silla around 470 as a bulwark against further incursions by Goguryeo, Gomosanseong is situated high above the Yeong River, nicely positioned to block military advance through the narrow valley. Built in the typical manner of late Three Kingdoms Silla fortresses, Gomosanseong features incredibly high, thick walls built atop steep, rocky crags. To the south, a later addition was made to prevent movement over the low ridge between Gomosan and Ojeongsan mountains. Interestingly, that addition was constructed in 1596, a lull in conventional fighting during the Imjin War (1592-98).