The Thirty-Nine Steps filmed at Morton Castle, Thornhill. This castle ruin near Thornhill features in the film's Scottish sequences.
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 Thornhill and it tells you what was shot around you, how to get there, and whether you can actually go in.
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