Free Events, Tours

The Historic Tour of Mark Twain Cave-Summer

When: June 1-Aug. 31, 8 a.m.-8 p.m., $6-$12. Mark Twain Cave and Campground, 7032-7037 County Road 453, (near Highway 79), Hannibal, 573-221-1656,

Experienced guides point out things mentioned in Twain's writings as they escort you on the 55 minute tour of Missouri's first show cave (which is also a registered natural landmark). The walkways are level and smooth, and there are no steps; the cave stays a constant 52 degrees year round.