The Marina Towers, a pair of residential skyscrapers in <a href="https://en.wikipedia.org/wiki/Chicago,_Illinois" class="extiw" title="w:Chicago, Illinois">Chicago, Illinois</a>.  Photograph taken on August 26, 2005 by <a href="//commons.wikimedia.org/wiki/User:Kelly_Martin" title="User:Kelly Martin">Kelly Martin</a>.  Reprocessed using hugin and PTStitch to correct keystoning in original image, December 31, 2006.
No machine-readable author provided. <a href="//commons.wikimedia.org/wiki/User:Kelly_Martin" title="User:Kelly Martin">Kelly Martin</a> assumed (based on copyright claims).
CC BY-SA 3.0
No machine-readable source provided. Own work assumed (based on copyright claims).