Namhansanseong Fortress is a historic site in South Korea, recognized as a UNESCO World Heritage Site. Perched on Namhansan Mountain, it served as a strategic military fortification and an emergency capital during the Joseon Dynasty. The fortress is notable for its architecture, which reflects the influence of East Asian fortress designs, and its role in the defense and administration of the region. Today, it stands as a testament to the rich history and cultural heritage of South Korea, attracting visitors who seek to explore its vast grounds and learn about its storied past.