서울에너지드림센터
Museum · Mapo-gu
Korea's first zero-energy public building, where the building itself is the solar and geothermal exhibit. Check eco-tour booking slots.
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Source: seouledc.or.kr

Nanji Hangang Park
FreePark · World Cup Stadium Stn. (Line 6) + bus
Free. A huge 12,000 sq m floor fountain (mirror fountain) for cooling off. Pairs with camping and outings along the Han River.
Nanji Hangang Park Basketball Court
₩4,000Sports facility · World Cup Stadium Stn. (Line 6)
Outdoor basketball court in Mapo-gu. 1 court.
World Cup Stadium Station Runners' Lounge
FreeSports facility · World Cup Stadium Stn. (Line 6)
A runners' base built inside the subway station. Use the changing rooms, lockers and washbasins for free, drop off your bag and head out for a run around Sangam.
Haneul Park
FreePark · World Cup Stadium Stn. (Line 6)
A silver-grass hill reclaimed from a landfill, spectacular for autumn reeds, sunsets and night views. Almost no shade at the top, so a hat and water are essential in summer; Maengkkongi electric shuttles run up.
Mapo Community Sports Center
₩2,500Sports facility · Mapo-gu Office Stn. (Line 6)
Community gymnasium inside the Mapo Community Sports Center, with badminton and table tennis courts, a gym and a bowling alley. Fees vary by activity, so check before you go.
Mangwon-dong Badminton Courts
FreeSports facility · Mapo-gu Office Stn. (Line 6)
Outdoor badminton courts in Mapo-gu. 516.6 m².
National Museum of Korea
Partly freeYongsan-gu · Ichon Stn. (Line 4, Gyeongui-Jungang Line)
Korea's largest museum, with all permanent galleries free. The spacious lobby and Reflecting Pond garden are good for a rest, and Wednesday and Saturday evening openings are quieter.
National Folk Museum of Korea
FreeJongno-gu · Gyeongbokgung Stn. / Anguk Stn. (Line 3)
A free museum of Korean daily life. The outdoor Memory Street and children's museum make it great for families.
Seoul Museum of History
FreeJongno-gu · Gwanghwamun Stn. / Seodaemun Stn. (Line 5)
A free museum on Seoul's transformation from the Joseon era to the present. The old Tram No. 381 outside is a photo favourite.
National Museum of Korean Contemporary History
FreeJongno-gu · Gwanghwamun Stn. (Line 5) Exit 2
A free modern history museum facing Gwanghwamun Square. Insider tip: the rooftop viewpoint takes in Gyeongbokgung and the square at a glance.
Postage Stamp Museum
FreeJung-gu · Euljiro 1-ga Stn. (Line 2) Exit 6, Myeongdong Stn. (Line 4) Exit 5
A compact free museum on the history of stamps. In the middle of Myeong-dong, so it's a handy escape from the heat or cold.