Yongsan Park Officers' Housing Complex 5

For more than a century the land at the center of Yongsan was a closed military base, and this small corner is one of the first pieces opened to the public as part of the future Yongsan Park. It was housing for US Army officers and their families: low red-brick homes with lawns and quiet streets that feel like an American suburb dropped into Seoul. Of the 18 buildings, 10 have been remodeled into a children's library, a playground, rest areas and exhibition spaces, and the rest stay as they were, so you can walk the lanes freely and look into some of the houses. Information boards near the entrance explain the site's long history, from the royal ice storage that gave Seobinggo its name to the post-1945 base. On social media, building 5520 is the best-known photo spot, and cherry blossoms in spring and red and yellow leaves in autumn draw the biggest crowds. Entry is free and no booking is needed, though only 500 people can be inside at once. It is a short walk from the National Museum of Korea and Yongsan Family Park.