I, Robot - Mackinac Bridge... In Chicago?
This is a pretty major blooper.
At various points in the film, we see the unmistakable structure of the Mackinac Bridge.
But, somehow, it's in Chicago?!
In the film, it was hinted that Lake Michigan was drained and used as some kind of storage area for robot parts, but there is no indication of how or why the bridge suddenly ended up in Chicago.