Towns & cities
Seoul Capital Area
Region of South Korea
Wikipedia names Seoul Capital Area as where 3 films and series were filmed; each title’s page links to the sentence that says so. Wikidata records no shoot here yet.

Filmed here, per Wikipedia
Wikipedia says these were filmed in Seoul Capital Area. Each title’s page links to the sentence that says so.
Filming locations nearby
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Landmarks & buildings Seoul Finance Center
South Korea · under 1 km
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Landscapes & nature
Cheonggyecheon
South Korea · under 1 km
Stream in Seoul, South Korea
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Castles & palaces
Deoksugung
South Korea · under 1 km
Palace
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Streets & squares
Cheonggye Plaza
South Korea · under 1 km
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Landmarks & buildings
Lotte Hotel Seoul
South Korea · under 1 km
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Landmarks & buildings
Ilmin Museum of Art
South Korea · under 1 km