Photo: Wikimedia Commons (CC BY-SA)
성동구립금호도서관
Library · Seongdong-gu
Public library in Seongdong-gu. Free entry and reading, fully heated and air-conditioned.
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Source: www.sdlib.or.kr
Eungbong Neighborhood Park Badminton Court
FreeSports facility · Haengdang Stn. (Line 5)
Outdoor badminton court in Seongdong-gu, with 1 court. Open 24 hours.
Eungbong Park (Daehyeonsan Reservoir Park)
FreePark · Singeumho Stn. (Line 5)
Eungbong was once a single ridge, but urban development split it into five parts managed separately: Eungbongsan, Daehyeonsan, the Daehyeon reservoir, Geumhosan and Maebongsan. Daehyeonsan Reservoir Park, run by Seoul's Eastern Park and Leisure Center, sits on top of the reservoir
Daehyeonsan Gymnasium
₩2,500Sports facility · Haengdang Stn. (Line 5)
Indoor badminton courts in Seongdong-gu. 6 courts.
Open Geumho Education and Culture Center
₩4,000Sports facility · Singeumho Stn. (Line 5)
Public indoor pool in Seongdong-gu with a 5-lane adult pool (25m) and a 3-lane children's pool (10m). Open swim 4,000 won per session, and there is a gym on site. Session times change monthly, so check before you go.
Geumho Neighborhood Park
FreePark · Geumho Stn. (Line 3)
Built into a change in ground level, with a gymnasium on the lower level whose rooftop connects to the park area above, making three-dimensional use of a limited site. The multipurpose gymnasium below has a total floor area of 6
Eungbongsan Mountain
FreeMountain & trail · Eungbong Stn. (Gyeongui-Jungang Line)
At 95m, the summit is a 20-minute walk. The octagonal pavilion frames superb night views of the Han River, Seongsu Bridge and Lotte Tower. Famous for spring forsythia.

Seoul Metropolitan Library
FreeJung-gu · City Hall Stn. (Lines 1, 2)
A landmark right in front of Seoul Plaza. Known for its stepped bookshelves and glass-walled plaza views, with a rooftop and cafe for a break.
Starfield Library
FreeGangnam-gu · Samseong Stn. (Line 2), Bongeunsa Stn. (Line 9)
Famous for its 13m-high shelves, this is a photo hotspot inside COEX Mall. Ideal escape from summer heat and winter cold, with plenty of seating.
Jeongdok Public Library
FreeJongno-gu · Anguk Stn. (Line 3)
A campus-style library on the Bukchon hillside. A healing spot where you can picnic on garden benches among spring cherry blossoms and autumn leaves.

Namsan Library
FreeYongsan-gu · Myeongdong Stn. / Hoehyeon Stn. (Line 4)
A library atop a stairway on the slopes of Namsan. Read a book, then walk straight on to Namsan Park and N Seoul Tower on a free route.
Jongno Library
FreeJongno-gu · Gyeongbokgung Stn. (Line 3)
On the edge of Sajik Park and Inwangsan. Read, then stroll the park; pair it with Gyeongbokgung for a full day.