Where was Faces of Children filmed?
1925 film by Jacques Feyder
Faces of Children (1925) was filmed in Grimentz and Saint-Luc, 2 places named in its Wikipedia article, in Switzerland. 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 article
The Wikipedia article names 2 places. Each links to the sentence that says so.

