How cool is this! The elevators to the observatory at the top of the new 1 World Trade Center in Manhattan show an animated time lapse video recreating the development of New York City's skyline, from the 1500s until today. You'll even see one of the old World Trade Center towers appear for a moment, and then fade away, memorializing the old towers that once stood on that very same spot.
It's a short video, but well worth your time. Watch and enjoy.