Lots of vintage tools and signs, along with vintage radios on display on the walls and shelves in the dining rooms. I like their burgers. The rest of their food is o.k., but I can similar stuff of better quality and at cheaper prices at local Mom and Pop's type places. The entrance and checkout area is an entire room full of products that are hard to find and general tourist stuff. I started stopping at them as they had an exchange library between their stores of books on tape. It was great for long trips. You could listen to the book for a small fee and drop it off at the next convenient one when you were done. I think they still do it via CD these days?
BTW, you can buy a coonskin cap, they've got 'em, don it, and belt out the theme song to "Davy Crockett" on your way home.
I do like the "Drink Yoo-Hoo" and "See Rock City" signs. The last one was so common when I was kid, when people would later ask me what "my sign" was, I'd tell them "See Rock City".
Traveling America before the interstates were everywhere was an adventure-land of tourist traps and oddball sights.