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

The oldest bridge in South Carolina may have been designed by the same man who created the Washington Monument.

The highest point in Alabama was almost completely deforested, but is now home to protected towers and trees.

More than five miles of underground passageways.

Once decrepit and slated for demolition, now one of the longest pedestrian bridges in the world.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

This historic train station has been converted to a locomotive themed hotel.

This funicular railway rumbles along for a mile up the nearly vertical face of Chattanooga’s Lookout Mountain.

FDR hoped to find a cure for polio in this Georgia town's warm springs.

The remains of one of America's first radiation testing grounds still rest ominously in a Georgia forest.

These ancient ritual mounds are our best window into the culture of the ancient Mississippians.

A man's home is his castle.

This abstract roadside poultry was saved from demolition by outraged drivers and pilots.

The ruins of a cotton mill that was burned in the Civil War are still hidden in a Georgia forest.

This massive store is home to an eccentric collection of vintage, retro, and peculiar goods.

An underground magnet for ever-changing street art.

Civil War soldiers, captains of industry, and paupers all interred on historic grounds.

The Battle of Atlanta in 360 degrees, featuring a corpse that bears a striking resemblance to Clark Gable.

The largest cemetery in Louisville is the final resting place of Col. Sanders and Muhammad Ali.

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

This presidential tomb was not dedicated until years after Harding's death due to personal controversy.

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

The final resting place of the most famous sharpshooter.

The highest point in Indiana is curated by an Eagle scout but may be in danger of losing its record to a nearby garbage pile.