10 years after people: In New York Harbor,the rusted wire rope that hold the ships to the dock snaps. The ships go down the Hudson River. The wooden ships,like sailboats sink, but the ships of metal progress towards Niagara Falls. The International Railway Bridge stops them in their tracks. But with all the ice,and the pushing of other ships,collapses the bridge. The ships fall down the falls one by one.
50 years after people: The harbor itself collapses into the water.