If you're visiting Toronto, please do yourself a favor and make a stop in Graffiti Alley to see an amazing array of street murals and other graffiti art! The variety of artistry makes for an interesting contrast between pieces and buildings upon which they're displayed.
It's skinny walkable alley with enough room for one car to get through - to give you a picture of the width. But it's somewhere I take the time out to come see when I'm in town to see family.
My hope is that the city keeps this space reserved for such community artwork as this.