A 300-yard long natural tunnel runs through a ridge deep in the Appalachian Mountains.

This former maximum-security prison is creepy, sobering, and supposedly haunted.

This winding road of 318 curves is a must-visit for (careful) motorcycle and sports car enthusiasts.

This road in the Great Smoky Mountains was supposed to assuage a displaced community, but ended up a $52 million dead end.

This boulder stays on its mountain thanks to a huge chain and on the map due to local legend.

An annual celebration of the region's successful elk reintroduction program.

Some North Carolina Cherokee have been keeping their history alive for decades with a single play.

Step back in time on this preserved 1800s farm.

The highest point in Tennessee, Clingmans Dome bears witness to the ravages of one type of insect.

Mile-long cave system near Great Smoky Mountains.

This improbable contraption was passed down through five generations of industrious Tennesseans.

An abandoned town is hidden in Great Smoky Mountains National Park.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

Kentucky, Tennessee, and Virginia meet at this point in the Cumberland Gap.

North Carolina's finest examples of Native American pictographs have survived for 5,000 years.

A cannonball from Union forces battling John Hunt Morgan made this church a permanent home.

While knives are the main feature in this store, visitors will also find dinosaur bones and meteorites.

Wild lights and sound effects turn a walk through some caves into an eye-popping 1960s tourist attraction.

All that's left of the quintessential "cabin in the woods."