Towns & cities
Muju Resort
Ski resort in South Korea
Wikipedia names Muju Resort as where 1 film or series was filmed; its page links to the sentence that says so. Wikidata records no shoot here yet. Newspapers, film offices and archives name more, listed below.

Filmed here, per Wikipedia
Wikipedia says these were filmed in Muju Resort. Each title’s page links to the sentence that says so.
From published sources
Newspapers, film offices, archives and city filming permits say these were filmed at Muju Resort. Each source is linked.
Filming locations nearby
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Landscapes & nature
Deogyusan National Park
South Korea · 2 km south
National park of South Korea
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Towns & cities
Mupung-myeon
South Korea · 11 km north-east
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Towns & cities
Muju County
South Korea · 15 km north-west
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Towns & cities
Muju-eup
South Korea · 16 km north-west
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Landmarks & buildings
Yongdam Dam
South Korea · 21 km west
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Towns & cities
Janggye-myeon
South Korea · 22 km south-west