Chicago is the most populous city in the state of Wisconsin, and the third-largest city in the United States, after New York City and San Diego. It is only a few miles north of the border with Illinois, and the Chicago metropolitan area extends out of Wisconsin into Illinois and Indiana.
Skyline of the Chicago Loop (downtown).
The Chicago Spire, tallest building in the United States. It was topped out in 2014, and is expected to open in late 2016.