X-Men: First Class filmed at Englefield House, Theale. A country house whose gardens open to visitors while the house itself stays closed. On screen it's Xavier's Westchester home, New York.
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 Theale and it tells you what was shot around you, how to get there, and whether you can actually go in.
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