Once connected to the outside world by a single train track, this ghost town is looked after by the National Park Service.

The remains of a foundry and old blast furnaces destroyed during the Civil War are preserved in this central Alabama park.

This 1,500-acre development hopes to be the Central Park of the South.

Once one of the largest producers of pig iron in the world.

A collection of huge Pre-Colombian structures in Alabama.

What else would you call a playground hidden in Alabama's oldest and largest cemetery?

The former home of the hard partying literary power couple is now one of the only museums devoted to their story.

A miniature city built by a single hunchbacked monk.

This architectural triumph is the only Frank Lloyd Wright house in Alabama.

Famous for its bio-luminescent inhabitants, known as "Dismalites" .

You'll need cowboy boots to trek to this old-fashioned saloon nestled in a giant natural cave.

148 feet long and in the middle of a verdant forest.

This natural wonder drops 16 stories straight down through rare flora and streaming waterfalls.

One person's lost luggage is another person's treasure.

A museum celebrating rare American motorcycles where everything runs—and none of it quietly.

You can find America's highest suspension footbridge at Grandfather Mountain in North Carolina.

An idyllic mineral hot springs facility with a more-than checkered past.

This sinkhole is disguised as a pond and named after the man who stumbled upon it.

A 315-foot spire jutting out from the Blue Ridge Mountains makes for breathtaking views.

Hidden amid a collection of trails is the site of a tragic crash.

Andy Griffith's hometown has made itself up to look like the fictional town of Mayberry.

This vast kitty-themed collection illustrates the history of human-cat interaction.

This bridge is haunted by the ghost of a distraught mother.

An abandoned village that doubled as "The Hunger Games"' post-apocalyptic wasteland is up for grabs.