Where was Pitfalls of a Big City filmed?
1919 film by Frank Lloyd
Pitfalls of a Big City (1919) was filmed in San Quentin Rehabilitation Center, 1 place named in its Italian Wikipedia’s Produzione 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 Italian Wikipedia's Produzione section
Italian Wikipedia’s Produzione section names 1 place. Each links to the sentence that says so.