Freedom Tower from near the base

The tower is square at the bottom and turns into an octagon as it extends upward. The midpoint will be a perfect octagon sized exactly to fit in the dimensions of a fallen tower. What is interesting with this point of view is that you only see one face of the octagon, so it appears to extend into infinity as it rises since the face will narrow to a point.
All of the rebuilt WTC buildings ate designed to play their lights and reflections off of each other. When they are complete it will be truly spectacular to see.