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

This 5-by-6-foot wooden hut is the smallest historic post office in the U.S.

This tiny 19th-century tunnel was built so a man could move his cows from one field to another.

One of the few surviving "Wigwam"-themed motels.

Visitors to this arboretum are greeted by three smiling giants crafted from sustainable materials.

A local scoured more than 1,000 acres for stone to create his masterpiece.

Mile-long cave system near Great Smoky Mountains.

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

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

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

This abandoned cemetery has a dark past of bodies buried over bodies.

A former 19th-century tavern, famous for its peach brandy and honey concoction.

An abandoned theme park with a strange and tumultuous past.

Prehistoric animals decorate this popular outdoor park.

The oldest operating Mississippi River–style steamboat still navigates the Ohio River.

The grave of the iconic Kentucky Fried Chicken mascot features a bust of the man behind the goatee.

One of the greatest boxers and humanitarians to ever live chose his hometown as his final resting place.

This huge clock made of flowers and simple machinery was once used a political weapon.

This grave marks the final resting place of a legendary frontiersman... unless it doesn't.

This modern castle sat empty for decades before a fire inspired its builders to complete its luxury halls.

Unique tower has outlasted a takeover of the company.

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

Abandoned for 60 years, this submerged bridge was completely forgotten until the lake was drained.

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