Verified Seoul cafe guide
Onion Seongsu · 어니언 성수
Onion Seongsu is a bakery cafe inside a reused 1970s industrial building near Seongsu Station. Visit for the preserved factory character and bread selection, then continue through Seongsu on foot instead of crossing Seoul for one photograph.
Why this branch matters
Seoul’s official tourism guide identifies this Seongsu branch as a converted former factory whose weathered walls, tiles and steel details preserve the building’s industrial history. It is a useful stop for understanding why adaptive reuse became part of Seongsu’s identity.
Plan the stop
The official listing places the cafe at 8 Achasan-ro 9-gil, Seongdong-gu, close to Seongsu Station Exit 2. Pair it with Seoul Forest, Yeonmujang-gil or nearby shops, and allow extra queue time on busy weekends.
What to order
The venue is known as a bakery cafe with a broad bread selection. Signature items, stock and prices can sell out or change, so choose from the current display and confirm ingredients directly if allergies or dietary restrictions matter.
Reality check
This is an operating cafe rather than a museum set. Seating and photo angles are not guaranteed; keep entrances and shared tables clear, and recheck the official listing or venue notice for current hours before travel.
Open the next guide
Official reference: check current visitor information. Hours, prices, stock, reservations and access can change.
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