Wild. We just went through the Grand Canyon Caverns last fall--never even heard of them till we were driving by on 66, coming back from Flag. About the funkiest tourist attraction left in America, but interesting. The cavern itself was set up as a bomb shelter for the whole town in the '60's, with giant stacks of government-issued crackers and canned water.
Mark, we've driven thru Kingman a bunch of times since my kid started school down there. I always look for an FJR with a dog in the side case. Gotta get your phone or something. Shoot me a PM.