Where was The Prowler filmed?
1981 film by Joseph Zito
The Prowler (1981) was filmed in Cape May, Emlen Physick Estate and The Chalfonte Hotel, 3 places named in its Wikipedia article, in the United States. Wikidata itself records the shoot only as New Jersey. Each place says where its claim comes from.
Places per Wikipedia's article
The Wikipedia article names 3 places. Each links to the sentence that says so.
Recorded only at country level
Also filmed in New Jersey, but the exact places are not known, so they are not on the map.
Filming locations that are mapped there: United States