Seoul Forest and the Han River's Green Spaces
Seoul Forest (서울숲) is Seoul's big Western-style urban park, split into five zones: a Cultural and Arts Park, an Eco Forest, an Experiential Learning Park, a Wetland Eco Center, and a Hangang Riverside Park section. Inside you'll find a deer enclosure, a butterfly garden (open May–October, 10am–5pm) and an insect and plant garden (10am–5pm, closed Mondays), a big lawn, and bike paths linking to the Han River. It's open 24 hours and free to enter. Get there via Ttukseom Station (Line 2, Exit 8), about 540m away, or the closer Seoul Forest Station (Suin-Bundang Line, Exits 3/4), 242m away. Pets are welcome on a short leash, and the park rents wheelchairs and strollers free for up to two hours — this is the park for families and anyone who wants real greenery without leaving the subway system.
A short ride southwest, Seonyudo Park (선유도공원) sits on a small island in the Han River near Yanghwa Bridge. It has an unusual backstory: from 1978 to 2000 it was a water filtration plant serving southwestern Seoul, and when the plant closed it was rebuilt as an ecological park, reopening on April 26, 2002. The old filtration structures were kept rather than torn down — the park's "garden of green columns" is literally the concrete columns of the former reservoir, now covered in climbing plants. There's a Han River exhibit hall and a shallow (15cm) water playground for kids. At just 0.11 square kilometers, it works best as an add-on to a riverside walk rather than a destination on its own.
Olympic Park
Olympic Park (올림픽공원) in Songpa-gu opened on May 28, 1986, built for the 1986 Asian Games and the 1988 Summer Olympics. It's less a single park than a district: the grounds hold the Olympic Gymnastics Arena, Olympic Swimming Pool, Olympic Velodrome, and Olympic Tennis Courts, plus the Seoul Olympic Museum, the SOMA Museum of Art, and Mongchontoseong, an earthen fortress dating to the early Baekje kingdom that's now a walkable green mound inside the park. For casual visitors the draw is the Olympic Sculpture Park — roughly 200 outdoor sculptures across open lawns — plus the World Peace Gate, designed by architect Kim Chung-up and built 1986–88, which houses the eternal flame from the 1988 Paralympics. Reach it via Olympic Park Station (Lines 5 and 9, the latter added in 2018) or Mongchontoseong Station (Line 8). It's a half-day park — sculptures, museums, and picnicking on wide lawns — rather than a quick stroll.
World Cup Park and Haneul Park's Silver Grass
World Cup Park (월드컵공원) in Mapo-gu was built in 2002 to mark that year's FIFA World Cup, on the site of the former Nanjido landfill — genuinely reclaimed land. It's actually five linked parks, and the best known is Haneul Park (하늘공원), a former waste mound now covered in silver grass, native grasses, rock gardens, wildflower meadows, and sunflower fields, with an observatory looking out over the Han River. The Seoul Silver Grass Festival runs every October, and during the festival the park stays open until 10pm for evening viewing. Regular hours run 6am–10pm, shifting somewhat with the seasons, and night access is controlled to protect the site's wildlife. There's also a free, 24-hour dog play area near the Pyeonghwa Park parking lot. The nearest station is World Cup Stadium (Line 6, Exit 1), though it's a 1.6km walk in from there — plan for that if you're heading straight for the silver grass.
Namsan Park and the City's Mountain Parks
Namsan Park (남산공원) is Seoul's largest park and the closest thing the city has to a green heart. Entry to the park itself is free; the N Seoul Tower observatory (₩21,000 adults) and cable car (₩15,000 round trip) are separate paid attractions inside it. A stepped trail of roughly 1,000 steps leads to the summit for anyone who'd rather walk than ride, and the park is wheelchair-accessible, with elevators and free rental chairs. The nearest stations are Hoehyeon (Line 4, Exit 4) and Myeongdong (Line 4, Exit 3), both under a kilometer from the base. Night visits are popular — the observatory stays open until 10pm and the cable car until 11pm — and reviewers single out the summit for its views "especially at night."
Seoul also has real mountains inside city limits that work as parks rather than backcountry hikes. Inwangsan (인왕산), on the west side, is part of the Seoul City Wall route (covered fully in our Seoul City Wall guide) — its official trail is rated the hardest of the wall's six sections, five stars out of five, for rocky scrambling past the Chimabawi and Seonbawi rock formations, though it needs no special gear beyond sturdy shoes and care in winter. Bukhansan National Park, the only national park inside the Seoul metro area, has entrances reachable by public transit (from Gwanghwamun Station, Line 5, Exit 2, then a transfer to Bus 1020) and trails pitched at every level, from gentle paths to the unpaved 6.8km Uiryeong Pass route opened in 2009 — so you can step into a genuine mountain park without committing to a full peak-bagging day.
Riverside, Lake, and Stream Parks
Cheonggyecheon Stream (청계천) is the 11km waterway that cuts through downtown Seoul under 22 bridges before joining the Han River. The promenade is open 24/7, free, and lit at night, and it's reachable from City Hall Station (Lines 1 and 2, Exit 4) — the easiest green space to combine with a day of downtown sightseeing, though access closes in heavy rain for safety.
Seokchon Lake Park (석촌호수공원) in Songpa-gu circles two linked lakes — West Lake and East Lake — on a 2.5km loop next to Jamsil Station (Lines 2/8, Exit 2). It's free, open around the clock, and hosts a cherry blossom festival every spring that draws crowds to the lakeside, including a spot the city has designated a "Photo Island."
Seoul Botanic Park (서울식물원) in Magok, Gangseo-gu, is different from the rest — a paid botanical garden (₩5,000 adults, ₩3,000 teens, ₩2,000 kids, free under 6 and over 65) built around some 4,600 plant species, with themed gardens representing twelve world cities and a greenhouse of tropical and Mediterranean plants. The greenhouse and theme gardens close Mondays and run shorter hours in winter (9:30am–5pm, last entry 4pm), though the outdoor forest, lake, and wetland zones stay open year-round. The nearest station is Magongnaru (Line 9, Exit 3), convenient if you're killing time before a flight from nearby Gimpo Airport.
Seoullo 7017, the Elevated Walkway
Seoullo 7017 (서울로 7017) is Seoul's elevated linear park, built on a 1970s highway overpass near Seoul Station that closed in 2015 and reopened as a public walkway in May 2017 — the name combines the overpass's 1970 origin with its 17 connecting walkways and its 2017 reopening. Designed by the Dutch firm MVRDV, it runs about 1km at 17 meters above street level, planted with more than 24,000 plants across 228 species in raised containers, with terraces and small exhibitions along the way. It starts near Seoul Station — served by Lines 1 and 4, the Gyeongui-Jungang Line, and the AREX airport line — and threads northeast toward Namdaemun and Hoehyeon Station. It's a good stand-in for a park when you're short on time between trains: walkable in fifteen minutes, but worth lingering on for the view down onto the station's rail yards.
What to Know Before You Go
- Most parks above are free; the paid exceptions are Seoul Botanic Park and Namsan's tower and cable car (Namsan Park itself is free).
- Don't assume on-site food — bring your own or plan around a nearby convenience store.
- Bukhansan's trails and Inwangsan's rocky wall section call for real walking shoes; everything else here is paved or stepped and fine in ordinary shoes.
- Seasonal peaks: cherry blossoms at Seokchon Lake Park in spring, silver grass at Haneul Park every October.
- See our Hangang Parks and Bike Rental guide for riverside cycling, and Hiking in Korea's National Parks for Bukhansan's trail network in depth.