The park was designed by architect Jung-Sik Cho and landscape architect Sung-Jong Yoon.
It was the first ecological park in Korea to repurpose an existing industrial water purification facility.
The Sunyugyo Bridge is a rainbow-shaped pedestrian bridge designed by Rudy Ricciotti.
Original water filter beds were converted into sunken gardens and reflecting pools.
The site was originally a hillock before the water plant construction flattened much of the topography.
Rainwater is collected and filtered through natural water plants within the park's own internal drainage system.
Some of the concrete pillars from the old filtration building were left exposed to demonstrate the aging process of man-made structures.
Seonyudo Park is an ecological park located on an island in the Han River, built on the site of a former water filtration plant. The park retains the industrial skeleton of the original facility, repurposing old concrete sedimentation tanks and pipes into unique landscape features. It is connected to the mainland via the Seonyu Bridge, a pedestrian-only footbridge. The facility emphasizes environmental preservation, featuring botanical gardens and aquatic plant displays housed within recycled industrial structures. Walking paths wind through the remnants of the plant's architecture, blending concrete textures with native vegetation. The park serves as a hub for ecological education and urban design studies in Seoul. It occupies the entirety of Seonyudo Island, separating it from the main riverbanks by water and green buffers. The design purposefully highlights the transition from industrial utility to natural recreation.
The Greenhouse at the center of the park, where light hits the iron beams and glass panels.
Bring a portable charger, as the walking paths are extensive and provide many opportunities for photography.
The park offers limited shade, so carry sun protection if visiting during the summer months.
Visit the visitor center first to pick up a map that explains the specific functions of the repurposed industrial structures.
Do not attempt to swim in the Han River or the park's decorative ponds, which are for filtration display only.
Refrain from touching or damaging the aquatic plants in the purification ponds; no bicycles or motorized scooters are permitted inside.
