TTC's train yard near Greenwood station. A definite highlight of Doors Open this year for me. I'm a big nerd for this kind of stuff.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/30624156@N00">Loozrboy</a> from Toronto, Canada
CC BY-SA 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/loozrboy/3561940092/">Greenwood subway yard</a>