NY Two
The last photo is from the World Trade Center site. I think I was there when I was a kid... for some reason I think I remember it, but I'm not really sure. Even if I had been there, I had no idea how large it was.
I still have no way to really know how big it was, but judging from the photos, it was about two times taller than the nearby buildings. I looked at them and tried to picture them crashing down... it's hard to believe. As I was walking around the area, I tried to picture what it would be like running from the ash cloud after they fell. Of everyone has seen the photos of people running away, but I still have no idea how far the clouds traveled.
The black building in the background is being taken apart piece by piece, floor by floor. It has a crack in it, and has to come down, but it's aboce the subway, so they can't implode it.