Seonyudo Park is Korea's first environmental-reclamation ecological park, built on a small island in the Han River by repurposing a former water-filtration plant that operated from 1978 to 2000; it opened as a park in 2002. Themed around 'water,' it keeps the old concrete filtration structures and reworks them into gardens like the Garden of Green Columns, the water-purification garden, and an aquatic botanical garden, blending nature with industrial heritage. Free to enter, it is a beloved spot for picnics, riverside strolls, and night views.
The Garden of Green Columns — ivy-clad remnant pillars of the old filtration plant, Seonyudo's signature photo spot
Water-themed gardens including the water-purification garden and aquatic botanical garden set among walking paths
Sweeping night views of the Han River, Yeouido, and the National Assembly — a favorite of photographers
A distinctive approach across Seonyu Bridge, a 469 m pedestrian-only bridge built to mark Korea–France ties
Spring blossoms (cherry, magnolia) that bloom a little later than elsewhere in Seoul, with relaxed picnic lawns
Good to know
RulesAs an ecological reserve, the park asks visitors to refrain from bringing pets; confirm the current pet policy before you go.
RulesNo general-vehicle parking inside the park (disabled vehicles only); use the paid lot at nearby Yanghwa Han River Park.
RulesIndoor facilities such as the Seonyudo Story Hall close on Mondays and have seasonal hours, so verify times if you plan to visit exhibits.
SafetySeonyu Bridge, the pedestrian approach, has been closed for extended repairs in the past; if you plan to arrive via the bridge, check that it is open before your trip.
SeasonBeing a river island, summer evenings bring mosquitoes and limited shade, while winter is windy and cold on the water — dress for the season.
MannersThe ponds and plantings are ecological displays, so don't wade in or damage the vegetation; during cherry-blossom and night-view peaks it gets crowded, so keep noise down and take your trash.
Practical info
About a 10–15 min walk from Seonyudo Station (Subway Line 9), Exit 2, via Seonyu Bridge. Open 06:00–24:00, free admission. By car, use the paid Yanghwa Han River Park lot. Confirm fees, hours, and bridge access before visiting.
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