Photo: Wikimedia Commons (CC BY-SA)
글빛정보도서관
Library · Gwanak-gu
Public library in Gwanak-gu. Free entry and reading, with heating and air conditioning.
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Source: lib.gwanak.go.kr
Gwanak Community Sports Center
₩3,410Sports facility · Nakseongdae Stn. (Line 2)
Public indoor pool in Gwanak-gu. Six-lane adult pool and a two-lane toddler pool. Open swim is 3,410 won per session. Open swim time slots change monthly, so check before you go.

Nakseongdae Park
FreePark · Nakseongdae Stn. (Line 2)
A park on the birthplace of General Gang Gam-chan. Pair the blue-tiled Anguksa shrine with the free exhibition hall.
Seoul Education Science Center
FreeMuseum · Nakseongdae Stn. (Line 2)
A free science center next to Nakseongdae. With an astronomical observatory and an ecology greenhouse, it fills half a day with kids.
Nam-Seoul Museum of Art, Seoul Museum of Art
FreeArt gallery · Sadang Stn. (Lines 2, 4)
Nam-Seoul Museum of Art is steeped in history and invites you to linger.
Janggunbong Neighborhood Park Badminton Court
FreeSports facility · Seowon Stn. (Sillim Line)
Outdoor badminton court in Gwanak-gu. Badminton courts. Open 24 hours.
Seoul National University Museum of Art
FreeArt gallery · Seoul Nat'l Univ. Stn. (Line 2) + bus
Contemporary art for free in a cantilevered building designed by Rem Koolhaas. Combine it with a campus stroll.

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.