Worley’s Cave, also known as Morrill Cave, lies just outside of Boone across the Tennessee border. It is the second longest cave in the state of Tennessee at a whopping 4.4 miles in total length. It is a non-lit cavern that’s path is lit only by those who venture in its depths (i.e. headlamps, lanterns, flashlights, etc.). With no artificial light to be had, Worley’s Cave allows for an authentic spelunking experience unlike some of your more popular “spelunking” excursions across the Appalachian Mountains. A solid choice for those adventurers who never want to cancel their weekend plans due to good old Mother Nature’s misfortunes.