World Trade Center 18
This was the first time I've visited Lower Manhattan since construction had just started on 1 WTC. It was a remarkable, humbling, and almost surreal experience to visit that site, with all the new buildings and ongoing construction. I'm just old enough to remember 9/11, and it's amazing to see in my lifetime the reconstruction of this site (since my first visit was when it was still Ground Zero in 2006). If anyone is planning a visit to New York, the new World Trade Center and the 9/11 Memorial are must visits.