The Butterfly Effect filmed at Monroe Correctional Complex, Monroe. Evan is locked up in a harsh prison, with many extras played by real residents of this facility.
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 Monroe and it tells you what was shot around you, how to get there, and whether you can actually go in.
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