Towns & cities
Lostwithiel
Small town and civil parish in Cornwall
Wikipedia names Lostwithiel 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 Lostwithiel. Each title’s page links to the sentence that says so.
Filming locations nearby
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Castles & palaces
Lanhydrock House
England · 4 km north-west
Country house in Lanhydrock, Cornwall, England, UK
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Towns & cities
Lanhydrock
England · 4 km north-west
Civil parish in Cornwall, UK
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Towns & cities
Luxulyan
England · 6 km west
Village and civil parish in mid Cornwall, England
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Landscapes & nature
River Fowey
United Kingdom · 7 km south
UK river in Cornwall, England
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Streets & squares Bodmin and Wenford Railway
England · 7 km north-west
Heritage railway line in Cornwall, England, UK
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Landscapes & nature
Eden Project
England · 7 km south-west
Visitor attraction in Cornwall in the United Kingdom