Haemi Fortress in Seosan is a historic site from the Joseon era, known for its role in Korea's history and as a place of Catholic martyrdom. It also gained fame as a filming location for the drama Mr. Sunshine, offering a picturesque and historic backdrop. A must-visit for history and drama fans! 📍 Address: 충청남도 서산시 해미면 남문2로 143 (143 Nammun 2-ro, Haemi-myeon, Seosan-si, Chungcheongnam-do, South Korea)