서초구립반포도서관
Library · Seocho-gu
A quiet district library near Banpo and the Express Bus Terminal. The spacious reading room is a good refuge from heat and cold.
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Source: seocholib.or.kr
National Library of Korea
Free if eligibleLibrary · Express Bus Terminal Stn. (Lines 3, 7, 9), Banpo Stn. (Line 7)
The national library with Korea's largest collection. With just an ID you get a day of free access to vast materials and comfortable reading rooms.
Yongheori Neighborhood Park Basketball Court
FreeSports facility · Gangnam Stn. (Sinbundang Line)
Outdoor basketball court in Seocho-gu. 1 court. Open 24 hours.
Jamwon Library
FreeLibrary · Jamwon Stn. (Line 3)
Public library in Seocho-gu. Free entry and reading, fully heated and air-conditioned.
Myeongju Neighborhood Park Badminton Courts
FreeSports facility · Jamwon Stn. (Line 3)
Outdoor badminton courts in Seocho-gu. Badminton court. Open 24 hours.
Myeongju Neighborhood Park Basketball Court
FreeSports facility · Jamwon Stn. (Line 3)
Outdoor basketball court in Seocho-gu. 1 court. Open 24 hours.
Banpo Hangang Park Upstream Basketball Court
FreeSports facility · Jamwon Stn. (Line 3)
Free outdoor basketball court inside Banpo Hangang Park. There are two courts, No. 1 and No. 2, open 06:00–20:00. Best to avoid slots booked by teams.

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.