No, I've never got to do any caving in Colorado, mostly in New Mexico and Arizona, and a little in Missouri. Never heard of the cavern of gold, but it sounds interesting I'll have to see if I can find anything on the 'net on it. I've slowed down a lot on my caving, I'm 54 now and after breaking a BUNCH of ribs in a motorcycle accident a couple of years ago I don't hold up to the crawling and squirming around as well as I used to!