Place Ville Marie is only one part of Montreal's underground city of 29 kilometers (some locals say 60km) of multi-level underground malls connected to each other.
You can enter this underground city from many places around downtown, but we entered it across the street from The Queen Elizabeth Hotel.
You can literally get lost and never know where you will come out above ground.
You can find everything in the underground city. Just in the Place Ville Marie, which is small compared to other parts, there are many restaurants (see journal entry on Restaurant Marche Movenpick), beauty salons, perfumeries, banks, pharmacies, and of course, lots of men, women, and children shoes and clothing.