Labor provided by Great Depression-era programs restored these 25,000 acres in Tennessee.

A collection of huge Pre-Colombian structures in Alabama.

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

These ruins are all that's left of the former Alabama State Capitol.

This simple, broken column marks the final resting place of one of America's most famous explorers.

This space rock fragment is one of the only meteors to have ever struck a human.

A rusted metal giant pays tribute to Birmingham’s industrial past.

What better place to take a seat?

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

A natural history museum with an extensive collection of bird dioramas.

A strange history museum, with items accumulated by a pair of globe trotting spies.

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

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

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.

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

All you ever needed or wanted to know about America's favorite whiskey, but not a drop to drink.

A miniature city built by a single hunchbacked monk.

This 12-foot-tall T-rex is the largest K’Nex skeleton sculpture in the world.

It may look like no more than a full-scale model, but every part of this full Space Shuttle stack had a working role in aviation history.

Bananas are often left for the first monkey America ever recovered alive after being launched into space.

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