The Best Place in Seoul to Do Nothing, Cut Into 9 Themes! Hangang River Area Guide—12 Parks, All Free and Open 24 Hours, Bikes for ₩1,000 an Hour, Convenience-Store Ramyeon, a 570 m Rainbow Fountain
Want one day in Seoul doing nothing at all? The river is the place. Here’s the thing: 12 Hangang parks sorted by cycling, picnics, the Banpo fountain, pools, cruises and night views—with exits, prices and seasons verified on Google Maps. Shopping, beauty and rainy days are its weak points, and that too is the Han River in autumn 2026.