The Crown filmed at Slains Castle, Cruden Bay. A cliff-top ruin above the North Sea stood in for a royal retreat, shot from outside only. On screen it's Castle Mey.
Probable Named in published production coverage; the coordinate is the place itself, checked against a gazetteer.
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Venture keeps every scene location on one map, sorted by how far you'd have to walk. Open it in Cruden Bay and it tells you what was shot around you, how to get there, and whether you can actually go in.
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