The First Canadian Place is a 71 story, 297 meter building located in Toronto, Ontario, Canada. It is the tallest building in Canada since 1975. Now, without people, how long can it last?
50 Years After Prople: All of the the building's windows is gone with 50 years of Canadian weather. The building itself is still standing.
300 Years After People: After 300 years of Canadian weather, the First Canadian Place finally collapses, destroying the buildings in close range to it.