After you See Rock City and give the whole looking at seven states from atop the peak of Lookout Mountain a try, there is only one place left in this Tennessee vacation spot for you to hit. It is time to turn your kids into mole people, lace up their finest hiking boots and trek down into the ground beneath the surface of that majestic plateau of Tennessee limestone. What awaits you and the kids in the coolness that can only be found in the summertime 1,200 feet underground?

Ruby Falls! Yeah, sure, you've heard of Niagara Falls and all the other spectacular falls that America has to offer, but they are all aboveground. As amazing as the sight of a raging river falling over a cliff in the great outdoors may seem, that's nothing compared to the 145-foot drop of Ruby Falls, which takes place entirely beneath the ground. There is simply no other waterfall in the United States that compares to Ruby Falls.

How many times have you heard that what's important is the journey rather than the destination? Well, you can have it both ways at Ruby Falls. The destination is, of course, that amazing waterfall, but along the way you will be treated to all the memorable sights that make up a spectacular cavern. In addition to the expected stalagmites and stalactites (your kids can probably tell you which one is which if you are confused), there are also unusual rock formations with memorable names. Although you will probably see any number of these amazing rock formations, it is almost guaranteed that your kids will remember one rock formation in particular twenty years after the visit to Ruby Falls. It is called Steak and Eggs. Keep an eye out for it!

Ruby Falls, Lookout Mountain and Rock City make up a fascinating trip for kids and adults alike, and anyone living in proximity should make a trip to all three.