Where was Unknown (2006) filmed?
2006 film by Simon Brand
Unknown (2006) was filmed in Coachella Valley, 1 place named in its Wikipedia article's Production section, in the United States. Wikidata records no filming location for it at all, so the article is the only recorded source. Each place says where its claim comes from.
Places per Wikipedia's Production section
Wikipedia’s Production section names 1 place. Each links to the sentence that says so.
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Landscapes & nature
Coachella Valley
United States
Valley in southern California, United States
“Portions of the film were shot in the Coachella Valley, California.” Wikipedia