Would you like to leave your hotel, shop, go to the cinema, get your hair cut and do groceries without ever seeing the light of day?I bet you would if it's -20 outside during a frosty Montreal winter!The underground city is where downtowners live their lives during the coldest months, and with nearly 18km of combined amenities and shopping underground, it's easy to do everything you need to do without needing to go outside.Oh, Canada!