Aon Center
Glass Steel and Stone: "Well known in Chicagoland, but not so well known elsewhere, the Aon Center is the quiet, dignified supertall in the Chicago skyline. It lacks the flashy spires of Sears and Hancock, and instead goes for vertical stripes to add extra visual height to its already impressive stature. From a distance, the building feels like another boring grey 1970's stone block. But to really appreciate the Aon C..."