Where was Our Lady of the Turks filmed?

1968 film by Carmelo Bene

Our Lady of the Turks (1968) was filmed in Gallipoli, Salento, Santa Cesarea Terme, Grotta Zinzulusa and Castro Marina, 5 places named in its Wikipedia article, 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 Wikipedia's article

The Wikipedia article names 5 places. Each links to the sentence that says so.