Hongseong Hongju-eupseong
20-1 Amun-gil, Hongseong-eup, Hongseong-gun, Chungcheongnam-do, South Korea
This Joseon Dynasty fortress in Hongseong County, Chungcheongnam-do features 800 meters of remaining stone walls from the original 1,772-meter perimeter. Construction began during King Sejong's reign…