Toronto, Canada
Graffiti Alley, officially Rush Lane, is a three-block, 1-km alleyway in Toronto's Fashion District, known for hosting street art. Lonely Planet has called the site "possibly the most popular place to check out street art in Toronto". The alleyway was used prominently as the backdrop in Rick Mercer
Report's "Rant" segment. Despite its popularity with tourists and leniency by law enforcement, it is not a legal wall.
Listen to the audio guide for Graffiti Alley Free on WIP — starts by itself when you arrive, even with the screen off