The largest puppetry museum in the United States houses the world's most complete collection of Jim Henson artifacts.

Visit this playground of waterfalls, caves and sinkholes.

Healing Springs that once ran red with soldiers' blood.

Beside some power panels, a plaque celebrates the history of an alternate world.

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

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

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

The ruins of a paper mill destroyed during the Civil War still tower over a tributary of the Chattahoochee River.

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

A man's home is his castle.

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.

These ancient ritual mounds are our best window into the culture of the ancient Mississippians.

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.

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

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

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

Live long and prosper in Tennessee.

This labyrinth was designed to help visitors focus and meditate.

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

Follow the steps, and this roadside artwork will teach you how to dance.

This large cave is a summer home to thousands of bats and has a rich history dating back to prehistoric times.

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