Landscapes & nature
Graig Ddu Quarry
Disused slate quarry near Blaenau Festiniog in North Wales, UK
Wikipedia names Graig Ddu Quarry 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 Graig Ddu Quarry. Each title’s page links to the sentence that says so.
Filming locations nearby
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Towns & cities
Blaenau Ffestiniog
Wales · 2 km west
Historic mining town in Gwynedd, Wales
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Landmarks & buildings
Llechwedd Slate Caverns
Wales · 2 km north-west
Tourist attraction in Gwynedd, Wales
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Landscapes & nature
Eryri National Park
Wales · 7 km south
National park in Wales
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Castles & palaces
Dolwyddelan Castle
Wales · 7 km north
Castle in Conwy County Borough, Wales
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Landscapes & nature
Llyn Gwynant
Wales · 10 km north-west
Lake in Gwynedd, Wales
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Towns & cities Nant Gwynant
Wales · 10 km north-west
Valley in Beddgelert, Gwynedd, Wales, UK