Eric and I also went to the top of the Freedom Tower. The walls of the elevator were floor-to-ceiling video displays showing a CG representation of the island of Manhattan from the 16th century to the present.
Despite the nauseating hypercapitalism of the whole thing (ticket price! VIP upgrade! AR tablet rental! mandatory group photo! garish souvenir shop!) the views from the top were impressive.
The black square below is the fountain of the National September 11 Memorial & Museum built on the footprint of the old Twin Towers.
I discovered that the Freedom Tower is the tallest building in the Western hemisphere and then realized that I had been to the top of 4 of the tallest 11 buildings (currently) in the world.