One thing that I find difficult to find are interior pictures of stadiums. Seeing what a stadium looks like inside gives me a better feel for stadiums that I haven't been in. Here are a few pictures of ones that I have been in:
Two pictures that I took of the interior of Ivor Wynne Stadium:
A few pictures I took within BMO Field: (from Sept 17, 2011)
East side stands
Under the east side stands
South-side open concourse
Under the North-side stands
Inside the Rogers Centre:
I would enjoy seeing more interior shots if anyone has any.