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

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

The remains of an idyllic small town built for the film 'Big Fish' still stand around a rundown main street.

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.

Once a bustling cotton factory, this early 20th-century building is now home to a thriving artspace.

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.

A propulsion engine testbed that paved the way for the Space Shuttle launch sits without recognition at this rocket center.

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

Designed by Maya Lin, the memorial honors 41 individuals who died fighting for equal rights between 1954 and 1968.

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?

A miniature city built by a single hunchbacked monk.

A former taxidermist has turned his old shop into a folk art mecca.

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