>>>I'm more interested in the 7 natural wonders of the world.<<<
My wife and I visited the Natural Bridge in Virginia a few years back. It is a true natural wonder. No photo can do it justice. It is higher than Niagara Falls, rests on land that once belonged to Thomas Jefferson, and George Washington surveyed it. G. W.'s initials are carved on the rock face. U.S. Highway 11 crosses the top of it.
http://www.naturalbridgeva.com/bridge.html
You know, I've lived in Virginia most of my life, driven by the exit dozens of times on road trips, but never stopped.
I will put that on my list of things to do soon.