The Martians used many Philadelphia locations for their Earth project.

Philadelphia Waterworks Memorial Hall Mermaid Inn Eastern State Penitentiary Elfreth's Alley Ruba Club

Carpenter's Hall City Tavern Second National Bank Exchange Building Independence Square Fort Mifflin

Temple University MA student, Colin Stewart scouts Fort Mifflin, Philadelphia for a class project. This was one of many locations used by the Martians during their brief stay.