Shot between 11 PM and Dawn, George Romero's second zombie movie was called "Dawn of the Dead" and was filmed in the Monroeville Mall.
So next time you are in Pittsburgh forget about the Duquesne Incline, the Carnegie Museums or Point State Park, head east on I 376 toward Monroeville and visit the Maul (get it).
If you take pictures, don't let the security catch you.