Where was The Frozen North filmed?
1922 short film directed by Edward F. Cline and Buster Keaton
The Frozen North (1922) was filmed in Truckee and Donner Lake, 2 places named in its Wikipedia article's Production section, in the United States. Wikidata itself records the shoot only as California. Each place says where its claim comes from.
Places per Wikipedia's Production section
Wikipedia’s Production section names 2 places. Each links to the sentence that says so.
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Towns & cities
Truckee
United States
Town in Nevada County, California, United States
“The film was photographed on location at Donner Lake outside Truckee, California, in mid-winter.” Wikipedia
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Landscapes & nature
Donner Lake
United States
Freshwater lake in California, United States
Recorded only at country level
Also filmed in California, but the exact places are not known, so they are not on the map.
Filming locations that are mapped there: United States