Towns & cities
Llandudno
Seaside resort in North Wales, UK
Wikipedia names Llandudno as where 3 films and series were filmed; each title’s page links to the sentence that says so. Wikidata records no shoot here yet.

Filmed here, per Wikipedia
Wikipedia says these were filmed in Llandudno. Each title’s page links to the sentence that says so.
Filming locations nearby
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Castles & palaces
Conwy Castle
Wales · 5 km south
Castle in Conwy, North Wales
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Towns & cities
Conwy
Wales · 5 km south
Town in Wales
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Landscapes & nature
Bodnant Garden
Wales · 10 km south
Arboretum in Conwy, Wales
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Towns & cities Tal-y-Cafn
Wales · 12 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 · 21 km south-west
Country house in Llandygái, Gwynedd, Wales