Shutter Island filmed at Medfield State Hospital, Medfield. The main building and first two wards of this shuttered psychiatric hospital stand in for Ashecliffe. On screen it's Ashecliffe Hospital for the Criminally Insane.
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 Medfield and it tells you what was shot around you, how to get there, and whether you can actually go in.
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