The Old Mill situated on the Little Pigeon River in Pigeon Forge is a beautiful mill that is still in operation.
You can buy cornmeal, mixes of all types, jams, jellies and lots of other neat things inside the store. They also have tours of the mill. I suggest buying some unmilled corn and feeding the ducks along side the river. :)
Attached to the mill is also the Old Mill Restaurant. They have FANTASTIC southern food. With every meal you get a cup of their corn chowder and corn muffins. Yum!!! Those alone are worth any wait that you will have.
Take some time to mill around the Old Mill. It is a great place to visit!