The Chicago skyline is an iconic symbol of the city. It’s filled with glass and steel, grey and blue; but one building stands out from all the others. Called “Big Red” by some, or CNA Center ...

The Willis Tower (formerly Sears Tower) rises above the city's skyline on Nov. 8, 2013 in Chicago. Readers of Conde Nast magazine recently selected Chicago as the Best Big City in the U.S. for the ...