By the way, "Doors Open Toronto" is an annual event, but there so many buildings are included that it would be difficult to run out of options.
Promoting my Toronto Doors Open Article
On a whim, I searched Flickr for the keywords and for a "commercial reuse" license. Behold the image already available thanks to George Socka of beachdigital.com!
Today's writing tip is to check for existing images before spending the time to make your own. Mr. Socka did a much better job than I could, and saved me time.