Inwangsan (Hanyangdoseong) Entrance is a trailhead for the Hanyangdoseong hiking path above Sajik Tunnel in Jongno, Seoul. The fortress wall route is climbable for beginners, and the summit opens onto a panorama of downtown Seoul. From the entrance, hikers can go up the western section of the Hanyangdoseong toward Inwangsan. Seodaemun History Park, Gyeonggyojang, and Wolam Park are nearby, and crampons are required on icy sections when it snows.