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

More than five miles of underground passageways.

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.

A bizarre roadside attraction and the first instance of miniature golf in the world.

A man's home is his castle.

This abstract roadside poultry was saved from demolition by outraged drivers and pilots.

This papier-mâché diorama celebrates an unusual landmark: the brightly-colored runoff from a local sock factory.

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

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

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

An abandoned railroad tunnel forgotten by time awaits inquisitive hikers.

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

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

Incredible miniature towns and buildings created and decorated with thousands of tiny rocks.

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

Tombstone of a dog that greeted passengers at the Southern Railway Depot.

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.