First built in 132 during the Baekje Era (BC 18-AD 660), Bukhansanseong Fortress, located inside Bukhansan Mountain National Park, was rebuilt as a stone fortress in 1711, during the Joseon Dynasty (1392-1910). The walls are 7 meters high, and 8km long. Bukhansanseong Fortress functioned as resting place for kings in emergencies when they had to abandon their palaces in the capital city and retreat. Therefore, Bukhansanseong Fortress was built to stand totally independent of the capital city.There are 15 gates to guard the fortress. With its 120 rooms, it was not as magnificent as the king’s palace, but enough for an emergency mountain palace. Especially making use of the ridgeline continuing on south from Baegundae Peak, Bukhansanseong Fortress was built to take advantage of the rough terrain and the cliffs of its surrounding area.The fortress has the fortification style representative of the Joseon Period, and its traditional architecture blends in beautifully with Bukhansan's scenery, famous for its lovely granite shapes. The fortress enclosure allows you to follow its walls on a leisurely walk. In the fall, the leaves turning color on the mountain make the fortress very picturesque.