The Three Musketeers: The Queen's Diamonds filmed at Palacio Real de Riofrío, Villaverde de Riofrío. A stand-in for a 17th-century French royal home, this palace sits in a woodland deer park. On screen it's French royal palace.
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 Villaverde de Riofrío and it tells you what was shot around you, how to get there, and whether you can actually go in.
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