4Aon Center, Chicago – 1,136 feet

The Aon Center is a towering skyscraper located in the heart of Chicago’s bustling downtown area. Standing at 1,136 feet tall, the building’s distinctive design and shimmering exterior make it a prominent landmark in the city’s skyline.
Inside, the Aon Center houses a variety of businesses and amenities, making it a hub of activity and commerce in the Windy City.