Banpo Bridge Rainbow Fountain is the world’s longest bridge fountain. The fountain is programmed to play different shows during the day and night. During the day, the fountain show different configurations meant to evoke waving willow branches/leaves. When the sun goes down, 200 lights illuminate the fountain as it sends up dancing, rainbow-colored jets of water in the air in synchronization with music. We started our 2 day itinerary walking to the bridge from our hotel in Itaewan but would recommend taking a taxi instead.