Eaton Centre705 Sainte-Catherine West, Montreal H3B 4G5
This huge shopping center in the middle of downtown has what seems like hundreds of stores on several levels and a large food court in the basement. It is very well connected, being part of the underground shopping network that Montreal is known for. There is an entrance directly into the McGill metro and you can pop into the underground city from almost anywhere downtown, including much of the shopping strip on Saint Catherine Street. If a clothing store exists in Canada, it will probably have a location in this mall, and maybe even a duplicate on Saint Catherine or in one of the connected shopping centres.