Landscapes & nature
Hwangmaesan
Mountain in South Korea
Wikipedia names Hwangmaesan 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 Hwangmaesan. Each title’s page links to the sentence that says so.
AssassinationThriller film2015
From published sources
Newspapers, film offices, archives and city filming permits say these were filmed at Hwangmaesan. Each source is linked.
Filming locations nearby
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Towns & cities
Sindeung-myeon
South Korea · 11 km south
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Towns & cities
Yongju-myeon
South Korea · 11 km north-east
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Towns & cities
Sancheong
South Korea · 12 km south-west
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Towns & cities
Yurim myeon
South Korea · 17 km west
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Towns & cities
Hapcheon County
South Korea · 18 km north-east
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Towns & cities
Daeyang-myeon
South Korea · 20 km east