Enormous lake at the bottom of a unique cave system.

The statues commemorate the legendary mass killing of escaped circus monkeys.

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

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

This small cemetery is all that remains of Atlanta's first Black communities.

An elegant Georgian cemetery best known for the grave of the little girl whose murder on Christmas Day remains unsolved.

An abandoned railroad tunnel forgotten by time awaits inquisitive hikers.

The pan man stands as a testament to the functionality of American cast iron cookware.

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

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

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

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

A man's home is his castle.

This mansion turned restaurant was once a pitstop for Al Capone during his travels.

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

More than five miles of underground passageways.

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

A failed utopian experiment for British expats in the American South is now a Victorian village frozen in time.

All that's left of the quintessential "cabin in the woods."

Railroad came. People came. Railroad left. Town died.

This stone is a marker of one millionaire's personal vendetta against gravity.

An unusual art exhibition in a suburban yard is designed to awaken the souls of those flowing by.

Some North Carolina Cherokee have been keeping their history alive for decades with a single play.

An abandoned town is hidden in Great Smoky Mountains National Park.