Alright, Superman is not from Cleveland, he’s from planet Krypton, however the creators of the character are. Writer Jerry Siegel and artist Joe Shuster were growing up in Cleveland, OH, when in 1930s they created Superman.
One of the fun reminders of that fact, is the permanent exhibit at the Cleveland Hopkins International Airport, debuted in 2012. It is located in the baggage area, near door 6.
The exhibit depicts a skyline of Cleveland on the back wall, which serves as a map to key locations in the creators lives. The talk bubbles provide commentary on the relevance of each location.