Pictures of graffiti art and city life photos offer a great array of photo opportunities. Check out this excellent article on street photography.
R&R at Navy Pier
© Michael UmbreitCity Studies
© Alan L. BorrorA Reflective Morning in Chicago
© Carol FlisakCurves and Angles
© Rona L. SchwarzCampus in Blizzard
© Mark V. FedkinPena Ventosa - Porto historical center
© Antonio Amen