Landmarks & buildings
COEX Mall
Shopping mall in Seoul
Wikipedia names COEX Mall as where 1 film or series was filmed; its page links to the sentence that says so. Wikidata records no shoot here yet.

Filmed here, per Wikipedia
Wikipedia says these were filmed in COEX Mall. Each title’s page links to the sentence that says so.
Filming locations nearby
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Landmarks & buildings COEX Convention & Exhibition Center
South Korea · under 1 km
Convention center in Gangnam, Seoul, South Korea
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Towns & cities
Samseong-dong
South Korea · under 1 km
Neighbourhood in Gangnam District, Seoul, South Korea
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Landmarks & buildings
Bongeunsa
South Korea · under 1 km
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Landmarks & buildings Seoul Gangnam Police Station
South Korea · under 1 km
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Landmarks & buildings
Cheongdam Station
South Korea · 1 km north-west
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Landscapes & nature
Tancheon
South Korea · 1 km north-east
River in South Korea