Seosan Haemi Eupseong Festival (서산해미읍성축제)

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.