The Petro-Canada Centre in Calgary, Alberta. Photo by Chuck Szmurlo taken at dawn, April 5, 2005 with a Nikon D70 and a Nikon 18-70 lens
Chuck Szmurlo (<a href="//commons.wikimedia.org/wiki/User:Cszmurlo" title="User:Cszmurlo">Cszmurlo</a>)
CC BY 2.5
<span class="int-own-work" lang="en">Own work</span>