We went to Canon City, CO (pronounced Canyon) with our Louisiana parents and saw the Royal Gorge.  It was breathtaking, literally.  It's about 1000 feet deep.  If you look close at the Arkansas River picture you can see tiny little telephone poles and a railroad track.  Billy likes to mountaineer in his flip flops by the way, and drive 60mph on switchbacks (dirt roads with no guard rails on cliffs).