Seosan Haemi Eupseong Festival (서산해미읍성축제)

*The information below is based on the 2025 festivals. Details for the 2026 festivals will be updated as they become available.*The Seosan Haemi Eupseong Festival is a cultural festival held at Seosan Haemieupseong Walled Town, an ancient fortress with a 600-year history. The festival combines light, music, and the historic fortress to create a fantastic nighttime scenery and offers content for all generations. During the day, visitors can enjoy sophisticated performances while picnicking, and at night, they can partake in a vibrant evening stroll.