this is a recent picture of the pontiac silverdome, which was once the continent's biggest, state-of-the-art multi-purpose entertainment complex. pontiac is considered a suburb of detroit, but it's almost the distance from ottawa to montreal. i'll have to find my way out there eventually....
the main tenant was the detroit lions (an american football team), but they also set several records for largest indoor rock concerts in the 70s (first the who, then led zeppelin, both in the 70,000s).
the stadium was sold off to private management a little over ten years ago and has been abandoned, now, for several years.
but a shot like that makes you wonder if there's a way in there to reclaim the space.
http://s.imwx.com/dru/2014/05/f264f804-530a-4a59-8a77-5672fe28844a_650x366.jpg