Landscapes & nature
Firth of Clyde
Mouth or estuary of the River Clyde, Scotland, UK
Wikipedia names Firth of Clyde as where 1 film or series was filmed; its page links to the sentence that says so. Wikidata records no shoot here yet.

Filmed here, per Wikipedia
Wikipedia says these were filmed in Firth of Clyde. Each title’s page links to the sentence that says so.
Filming locations nearby
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Towns & cities
Millport
Scotland · 11 km north-east
Town on Great Cumbrae Island formerly in Buteshire, now in North Ayrshire, Scotland, UK
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Towns & cities Saltcoats
Scotland · 14 km east
Town in North Ayrshire, Scotland, UK
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Towns & cities Largs
Scotland · 17 km north-east
Coastal town in North Ayrshire, Scotland, UK
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Landscapes & nature
Isle of Arran
Scotland · 18 km south-west
The largest island in the Firth of Clyde, Scotland
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Towns & cities Irvine
Scotland · 22 km east
Town in North Ayrshire, Scotland, UK
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Towns & cities Inverkip
Scotland · 28 km north
Village in Inverclyde, Scotland, UK