Metropolis is New York in the daytime; Gotham City is New York at night. ~ Frank Miller - Edit 1
Before modification by aerocontrols at 13/07/2018 03:32:49 PM
Once upon a time I thought Metropolis was Detroit, (primarily because of the Michael Keeton Batman films) and I think originally it was meant to be Chicago, but different writers of the actual stories have their own preferences.