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

An abandoned railroad tunnel forgotten by time awaits inquisitive hikers.

This park contains one of the largest concentrations of cedar glades, a unique and rare ecosystem.

This mysterious twin turboprop Grumman G-159 covered in graffiti has spent a decade and a half abandoned.

One of the world's largest automobile junkyards is a unique landscape of metal and moss.

Visit this playground of waterfalls, caves and sinkholes.

World's largest college campus includes a wildlife sanctuary and a former movie set on more than 28,000 acres.

The mysterious 855-foot zigzagging stone wall has been baffling people for centuries.

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

Crumbling ruins mark the site of a couple's grisly murder in the woods.

This "Plant Farm Museum" is home to the divinely inspired and visionary outsider artwork of Reverend Howard Finster.

This limestone outcropping was once a ceremonial site for ancient Native Americans.

The perfectly named cave drop is the deepest in the continental United States, almost matching the height of Seattle’s Space Needle.

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

More than five miles of underground passageways.

This stone incorrectly marks the 35th parallel, causing some territorial kerfuffles.