An 18th-century Spanish watchtower made entirely of seashell and concrete.

This 5-by-6-foot wooden hut is the smallest historic post office in the U.S.

Where school buses go to die and be reborn as whimsical works of art.

More than five miles of underground passageways.

Mile-long cave system near Great Smoky Mountains.

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

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

An ornate Buddhist temple located in an Atlanta suburb, built by and for the Laotian community.

A statue honoring 44 continuous years of greeting passing ships.

The site where Confederate president Jefferson Davis was defeated has been marked with a bust... that leaves that part out.

One of corporate America's best-kept secrets is also one of the most publicly displayed.

Like Mars, but much closer.

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

Performers, intricate sets, and a real speakeasy tell the story of the 18th Amendment.

The Battle of Atlanta in 360 degrees, featuring a corpse that bears a striking resemblance to Clark Gable.

This haunting tombstone comes complete with a heartbreaking story of love and loss.

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

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

A man's home is his castle.

Just a few miles from downtown Atlanta is a trail covered in a crazy collection of outsider art.

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

The world's largest set of the ten commandments lay nestled in the heart of the Great Smoky Mountains.

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