It's a great spot to view the sunset. You will get off with the Hannam Bridge Observation Café, then go all the way down to Hangang Park. You then go as much as another viewpoint on the bridge and wander as there is not any bus around the bridge https://haeundaedistrict78888.bloggosite.com/42707735/fascination-about-gangnam-nightlife-itinerary-강남퍼펙트