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I loved this underground city in Montreal. These are mainly office buildings from what I could tell. Above is a huge skylight, with a stratigic design to allow for the snow to melt as well as the light to come into the courtyard and the buildings. It is adjacent to the "Metro" (subway). If you look in the bottom middle, that is an outdoor cafe, indoors. To the right is a reflecting pool. What you don't see are the marvelous classic statues and stair case, bottom right. I'd love a balcony view!