... as a child, I remember looking up at these looming towers as we drove by them along the highway. I knew they has something to do with 'Defense' and that they relayed radio messages.
( Giants, in the twilight. Whispering to each other about the end of the world.)
... here's a cool link to a pamphlet from the Bell System
all images- Right click- open in New Window= super colossal size!