Think Montréal streets are cool? Just wait ‘til you see what’s underneath! Explore Montréal’s famed Underground City, a pedestrian network right under the heart of the city for kilometres. Linking metro stations to shopping plazas for over 33 kilometres (about 20.5 miles), the underground pedestrian network — as it’s officially dubbed — is a lifesaver when you want to stroll, shop and eat away from the hot blazing sun or the freezing snow, but it’s also a go-to destination for the whole family anytime.