Where was The Swimmer filmed?
1968 film by Frank Perry
The Swimmer (1968) was filmed in Westport, 1 place named in its Wikipedia article's Production section, in the United States. Wikidata itself records the shoot only as Connecticut. Each place says where its claim comes from.
Places per Wikipedia's Production section
Wikipedia’s Production section names 1 place. Each links to the sentence that says so.
Recorded only at country level
Also filmed in Connecticut, but the exact places are not known, so they are not on the map.
Filming locations that are mapped there: United States