Where was Hercules Unchained filmed?

1959 film by Pietro Francisci

Hercules Unchained (1959) was filmed in Riserva naturale regionale Tor Caldara and Parco suburbano Valle del Treja, 2 places named in its French Wikipedia’s Production 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.

See them on the map → Wikipedia Source data

Places per French Wikipedia's Production section

French Wikipedia’s Production section names 2 places. Each links to the sentence that says so.