The Garrett-Jacobs Mansion is a historic 19th century Baltimore building that is currently home to the Engineers Club. Director Terry Gilliam said they filmed there for one reason: the building's unique spiral staircase (seen here just as Cole vaults over the banister) that ends up reflecting the twisting nature of the story.

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Cole and Kathryn Railly end up at Philadelphia's Metropolitan Opera House on their search for the Army of the Twelve Monkeys. The building was in a bad state of disrepair at the time of filming. It is currently owned by the Holy Ghost Headquarters Revival ministry which has nothing to do with that shot of the street preacher standing in front of the Met sign that I grabbed from the movie.

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The dream sequences and the end of Twelve Monkeys were filmed at the Philadelphia Convention Center, a former train station transformed into an airport for the movie.

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The mental institution where Cole first meets Jeffrey Goines was filmed at the Eastern State Penitentiary in Philadelphia.

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Twelve Monkeys was shot primarily around Philadelphia and Baltimore. The beginning of the movie where Cole is sent to the surface was filmed at Philadelphia's City Hall and then the environment was aged to look appropriately post-apocalyptic in post-production.

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