If you go, you must go around Canada day. They have a waterfall from the high level bridge down to the North Saskatchewan River. It's something else to see, and they only run it for Canada day. (Actually, now that I think about it, I think they run it during other events too, but definitely on Canada day...)
You should also check out the Muttart Conservatory, just cause they're cool buildings.
You should also check out the Muttart Conservatory, just cause they're cool buildings.