I took my kids to see Colossal Cave over the holiday, which gave me a chance to do a little hands-on research for my current wip The Dragon’s Cave. The cave has been open to the public since the 1800’s, which means it has not been as carefully controlled as Karchner Caverns. At Colossal Cave, there are stones that have been worn smooth from touch. It makes for a great experience for kids, complete with the tale of outlaws and hidden treasure.
The cave I imagine in The Dragon’s Cave is colored with gems in blue, black and green, while this one is oranges and reds. You can see some of the beautiful natural architecture in this photo: