Water pours from both railings of the Banpo (Submergence) Bridge into the Han, and at night the lighting turns it into the 'Moonlight Rainbow Fountain,' one of Seoul's signature night views. About 380 nozzles discharge roughly 190 tons of water per minute.
It runs only from April to October, usually several times a day. The best vantage is the lawn near Sebitseom on the bridge's south end, and it adjoins the Han River Park, so it works as a picnic spot.
Honest tips: showtimes vary by month, with peak season July-August running multiple shows from day into night — check exact times on the Han River Park site on the day of your visit. Strong wind or low water temperature can cancel shows without notice, so a wasted trip is possible. Claim a spot 20 to 30 minutes before start, and bring a mat and light snacks for a classic Han River night picnic. About 15 minutes on foot from Express Bus Terminal station.
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