Where was The Mysterious Rider filmed?
1948 film by Riccardo Freda
The Mysterious Rider (1948) was filmed in Pescasseroli and Abruzzo, Lazio and Molise National Park, 2 places named in its Italian Wikipedia’s Luoghi delle riprese section, in Italy. 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 Luoghi delle riprese section
Italian Wikipedia’s Luoghi delle riprese section names 2 places. Each links to the sentence that says so.

