Kentucky's only underground boat tour and Butterfly Habitat await you at Lost River Cave & Valley. Daylight disappears from view as you board the boat on the river that Ripley's Believe It or Not claims is the shortest, deepest in the world. A comfortable 57 degrees year round, the boat tour offers a visit into the timeless world of a Kentucky Natural wonder. The walking tour along the river's edge will bring alive stories of Native Americans, Early European settlers, Civil War troops and the notorious Jesse James. Enjoy Treetop Bridge, nature trails, bird watching stations, picnic area, gemstone sluice, and Old Mill Gifts.