For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

One of the largest-ever mental hospitals now sits abandoned, surrounded by 25,000 unmarked graves.

A failed utopian experiment for British expats in the American South is now a Victorian village frozen in time.

The secret city built by the Manhattan Project.

A curious whirlpool formation supposedly capable of entangling or engulfing branches, tree trunks, or whole rafts full of hapless tourists.

The house that Southern rock built now stands as a monument to one of the genre's favorite families.

This award-winning men's bathroom was just too beautiful to not allow women to see.

Victorian-era Egyptomania left its mark on this Nashville landmark.

When Motown musicians came to Nashville in the 1960s they stayed at this historic record-pressing company because hotels wouldn't host them.

Enormous lake at the bottom of a unique cave system.

Where school buses go to die and be reborn as whimsical works of art.

That bass was as bad a fish as any angler ever knew.

Visit this playground of waterfalls, caves and sinkholes.

These early tent-shaped grave coverings are unique to Appalachia.

Instead of becoming a power plant, this abandoned complex became a massive letdown.

They call this long foot bridge a swinging bridge, but really it's the bouncing you have to watch out for.

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

The longest non-mortared wall in the country is one man's tribute to his displaced Yuchi ancestor's five-year journey to her homeland.

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

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

More than five miles of underground passageways.

3/4-scale model of the White House in Atlanta, Georgia.

A bizarre roadside attraction and the first instance of miniature golf in the world.

The world's first time capsule lies behind a welded steel door in Atlanta.