Landscapes & nature
Monmouthshire and Brecon Canal
Network of canals in South Wales
Wikipedia names Monmouthshire and Brecon Canal 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 Monmouthshire and Brecon Canal. Each title’s page links to the sentence that says so.
Filming locations nearby
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Towns & cities
Crickhowell
Wales · 5 km north-west
Town and community in Powys, Wales
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Towns & cities
Abergavenny
Wales · 6 km east
Town and community in Monmouthshire, Wales, UK
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Towns & cities
Blaenavon
Wales · 6 km south
Town in Torfaen, Wales, UK
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Towns & cities
Tretower
Wales · 9 km north-west
Hamlet in the county of Powys, Wales
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Castles & palaces
Tretower Court
Wales · 9 km north-west
Grade I listed fortified manor house in Cwmdu, Powys, Wales
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Towns & cities
Ebbw Vale
Wales · 9 km south-west
Town in Blaenau Gwent, Wales, UK