Namsan Dulle-gil is a hiking course in the center of Seoul that follows forest paths and flower-lined trails, connecting to wide walking paths. During cherry blossom season, walking from the National Theater along the Namsan cherry blossom path and back takes a little over an hour. Walking past autumn leaves and flowers, you can gauge the old Hanyang boundary at the Namsan summit Bongsudae. Going up via the Hanyangdoseong-gil, steep stairs continue without end and leave your legs stiff.