Wisconsin

Wisconsin is one of the 50 states in the US. It's capital city is Madison and it's largest city is Milwaukee.

History
After getting run out of Florida, the Simpson family was trying to decide on where to go for their next vacation. They were looking at a map of the US that had most of states crossed out, which were apparently all the states that the Simpsons were no longer allowed to enter.

While looking through the bookstore Rock Bottom Remainders, in Springfield Mall, Marge found a book titled Wisconsin From Above. The book presumably contained various arial photographs of the state.