Gyeonhwonsanseong Fortress: A Legacy of Rebellion in KoreaNestled in Sangju-si, South Korea, Gyeonhwonsanseong Fortress stands as a testament to a rebellious spirit. Built sometime during the Three Kingdoms period, this historic site was designated Monument No. 53 in 1984. Covering an area of over 35,000 square meters, the fortress offers a glimpse into a crucial…