Chicago' s Aon Center is an iconic, prestigious, Class-A building located directly across the street from Millennium Park. Our Center is situated on the 51st floor and features breathtaking unobstructed views of Lake Michigan and Navy Pier. With direct access to the Fairmont Chicago Hotel, the Lakeshore Athletic Club, The Mid America Club, the Chicago Pedway System and Michigan Avenue merely steps away, we make doing business in the Windy City a breeze.