Walks around Chicago

Since May 15, I've been taking walks around the north side of Chicago with my iPhone in hand for exercise.  As of August 30, 2012, according to a GPS app I've been using to track my walks, I've racked up over 300 miles.  The photo mosaic below is made of some of the 2000+ photos I've taken on those walks.  (Click on the mosaic for a larger view.)