Mo, Curly, and I went over to see the cavern today.
We had a good time walking down the steps and the ramp and a better time coming back up. Its not a bad deal, the sign on the door said $16 for adults, we used our advanced bargaining skills and paid $5 for all three of us.
My pictures are fuzzy and it looks like my shake ruined most of them but a few came out acceptable.