Landscapes & nature
Altai Mountains
Mountains in Russia, Kazakhstan, China, and Mongolia
Wikipedia names Altai Mountains 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 Altai Mountains. Each title’s page links to the sentence that says so.
Other filming locations in Mongolia
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Landscapes & nature
Gobi Desert
Mongolia
Desert in China and Mongolia
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Towns & cities
Ulaanbaatar
Mongolia
Capital and largest city of Mongolia
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Landmarks & buildings
Ulaanbaatar railway station
Mongolia
Railway station in Ulaanbaatar, Mongolia
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Countries & regions
Mongolia
Mongolia
Country in East Asia
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Towns & cities
Gandantegchinlen Monastery
Mongolia
Monastery in Bayangol, Ulaanbaatar, Mongolia
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Landscapes & nature
Khövsgöl Lake
Mongolia
Rift lake