When I saw this barn while we driving south in Kentucky toward Nashville, it reminded me of Kate Campbell's song of the same name, and I decied I had to go there.
Of course that was a dumb decision; Rock City is nothing but a huge (expensive) tourist trap. It does have lots of little passageways through big rocks,
a nice waterfall at the summit (I don't know where the water comes from),
and, if you don't like heights, a rather scary overlook (well, it is Lookout Mountain).
This pointer shows the seven states that supposedly can be seen from the mountain.
These are two parts of a panorama shot from that point on the overlook. According to Wikipedia, only four can actually be seen (TN, NC, GA, and AL).
The trail on the mountain ends with a cavern filled with gnomes and figures from nursery rhymes illuminated with UV light. It was just too tacky to reproduce here.