Of historic note is Zoo Tower in Philadelphia, PA as shot from the dutch door of a train I was riding in July 1985. It's the largest tower in North America and was named Zoo because of its location adjacent to the Philadelphia Zoo. Built in 1935 and at its peak, had a 227 lever machine to control switches and signals. I think Zoo is still manned, but I am not completely sure. There are plans underway to remote it.

