Castles & palaces
Conwy Castle
Castle in Conwy, North Wales
Wikipedia names Conwy Castle 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 Conwy Castle. Each title’s page links to the sentence that says so.
Filming locations nearby
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Towns & cities
Conwy
Wales · under 1 km
Town in Wales
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Towns & cities
Llandudno
Wales · 5 km north
Seaside resort in North Wales, UK
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Landscapes & nature
Bodnant Garden
Wales · 5 km south
Arboretum in Conwy, Wales
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Towns & cities Tal-y-Cafn
Wales · 7 km south
Village in Conwy, Wales, UK
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Towns & cities
Penmon
Wales · 16 km west
Village in Wales
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Castles & palaces
Penrhyn Castle
Wales · 19 km west
Country house in Llandygái, Gwynedd, Wales