Now there's a website that has archived full-color postcards of buildings, bridges, monuments, and other places in every county in Tennessee. It's called Penny Postcards from Tennesee, because the old cards originally cost just one penny to mail.
Lots of things have changed since then, including postage charges and the fact that there used to be a "cotton arch" down on Second Street. Who knew?
For some interesting glimpses of the past, go the Penny Postcard website.