Mark Twain Cave

In the Midwest's coldest week so far this winter, we headed underground - to the Mark Twain Cave show cave in Hannibal, Missouri!  It's a fantastic network maze cave, full of narrow, lofty fissure passages crisscrossing at odd angles.  Nature's sculpture of the bedded limestone walls is really interesting here, with high ledges, odd hanging rock formations, and rare flowstone cascades.  With four of us on the tour in this low-visitation time, we had lots of chance to explore and converse with our excellent tour guide, Max.