Yes, there is Old Montreal and the shops of rue Sainte-Catherine. But Montreal is much more, especially in the Plateau Mont-Royal neighborhood, a place famous for its alternative atmosphere. Here you find tons of street art, each piece more delightful than the next.
Most murals aren't spontaneous works by local artists but are part of the many street art festivals taking place on Boulevard Saint-Laurent throughout the year, like MuRAL. Artists come from all over the world to paint, lending an international vibe to the city but also some amazing pieces.
This here is one of my favorites, located on the corner of Saint-Laurent and Des Pins streets.