I was taking a picture of the fountain when I noticed the hint of turrets through the trees (on the left). This was my inspiration for the MSI headquarters building -- a mysterious turreted building you don't seem to notice unless you're looking for it.

A better view of the building that inspired the MSI headquarters building. It turns out that this is actually a fairly modern building, but I think it's more fun to imagine a medieval castle tucked away in lower Manhattan.