Originally Posted by fortis
It is hard to be specific about what I want to see - it is the architecture, nature - the autumn maple leaves (red, yellow, green and brown),
You'll be right in time to see the "colors festival". If you have a chance try to find time to visit the Laurentides. It's not too far from Montreal (1h) and there are a lot of beautiful places to take pictures of the autumnal colors.