Landscapes & nature
St Catherine's Island
Tidal island in Pembrokeshire, Wales, UK
Wikipedia names St Catherine's Island 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 St Catherine's Island. Each title’s page links to the sentence that says so.
Filming locations nearby
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Castles & palaces
St Catherine's Fort
Wales · under 1 km
19th century fort in Wales
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Towns & cities
Tenby
Wales · under 1 km
Town in Pembrokeshire, Wales, UK
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Towns & cities
Manorbier
Wales · 8 km west
Village and community in Pembrokeshire, Wales, UK
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Castles & palaces
Manorbier Castle
Wales · 8 km west
Grade I listed building in Pembrokeshire. Castle
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Landmarks & buildings
Pendine Sands
Wales · 15 km north-east
Beach in Carmarthenshire, Wales
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Towns & cities
Pembroke
Wales · 15 km west
Town, community and former county town of Pembrokeshire in West Wales