The Grand Budapest Hotel filmed at Schloss Waldenburg, Waldenburg. Most of the castle interiors were shot in this Saxon castle, which offers guided tours today. On screen it's Schloss Lutz.
Probable Named in published production coverage; the coordinate is the place itself, checked against a gazetteer.
Venture keeps every scene location on one map, sorted by how far you'd have to walk. Open it in Waldenburg and it tells you what was shot around you, how to get there, and whether you can actually go in.
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