Pittsburgh, Pennsylvania
Heinz Ketchup has it's headquarters here
So does Clark (You know, Clark bars)
Steel used to run the city back in the day, although not as much anymore.
Kennywood - An amusment park that houses many historic rides
More specifically in my area outside of Pittsburgh, there are almost as many claims to fame.
Harmony: Former home of the Harmonites. They were a religious group who didn't believe in reproducing. Needless to say, they're not around anymore.
Evans City: "The City of Black Gold" I don't think there was ever much oil here, but it says that on the sign as you come in. Also, Night of the Living dead was filmed in the Evans City Cemetary, just a few miles from my house.