Downton Abbey filmed at Wrotham Park. The film's indoor palace shots were taken at this Hertfordshire country house, which is closed to the public. On screen it's Buckingham Palace interiors.
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 a new city and it tells you what was shot around you, how to get there, and whether you can actually go in.
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