Old Jack Daniel (or Mr. Jack, as he was known hereabouts) didn't waste any time setting up his whiskey distillery after the Civil War came to an end. Founded in 1866, this is the oldest registered distillery in the United States and is on the National Register of Historic Places. It's still an active distillery; you can tour the facility and see how Jack Daniel's whiskey is made and learn how it gets such a distinctive earthy flavor. There are two secrets to the manufacture of Mr. Jack's famous sour-mash whiskey. The first of these is the water that comes gushing -- pure, cold, and iron-free -- from Cave Spring. The other is the sugar maple that's used to make the charcoal. In fact, it is this charcoal, through which the whiskey slowly drips, that gives Jack Daniel's its renowned smoothness.
After touring the distillery, you can glance in at the office used by Mr. Jack and see the safe that did him in. Old Mr. Jack kicked that safe one day in a fit of anger and wound up getting gangrene for his troubles. One can only hope that regular doses of Tennessee sippin' whiskey helped ease the pain of his last days. If you want to take home a bottle of Jack Daniel's, they can be purchased here at the distillery, but nowhere else in this county, which is another of Tennessee's dry counties. (No tastings at the end of the tour, I'm afraid.)
Note: It's easy to get here after visiting the Stones River National Battlefield. Continue on I-24 to exit 105, then drive southwest for 10 miles to Tullahoma and follow signs to the distillery in nearby Lynchburg.