Spelunking

I have to be in St. Louis, MO for some meetings this weekend.  On the way down to St. Louis we stopped in Hannibal - the home of Mark Twain.  We gave our kids the option of going to either the Mark Twain Cave (which features in his novel, Tom Sawyer) or to the less developed, less touristy Cameron Cave.  They chose Cameron Cave. Here we are spelunking through one of the 460 passageways.