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

Mai Tais and Navy Grog served up in one of the original tiki bars.

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

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

This quirky curiosity shop takes its cues from the world's bazaars.

This massive store is home to an eccentric collection of vintage, retro, and peculiar goods.

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

Ruins of a Carnegie family mansion on Cumberland Island.

Constant erosion has created a surreal landscape of bleached and preserved fallen trees.

An underground magnet for ever-changing street art.

A curious whirlpool formation supposedly capable of entangling or engulfing branches, tree trunks, or whole rafts full of hapless tourists.

One of the largest-ever mental hospitals now sits abandoned, surrounded by 25,000 unmarked graves.

Bad farming practices caused this unnatural natural wonder.

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

The beauty of urban decay, hiding some dark secrets.

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

An abandoned railroad tunnel forgotten by time awaits inquisitive hikers.

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

Home to drunken tower-climbing goats... seriously.

This Memphis recording studio launched the careers of Jerry Lee Lewis, Johnny Cash, and Elvis Presley.

Elvis's own personal tropical hideaway.

The juke joint where legendary soul artists ate, drank, and made merry.

Colorful Native American paintings are hidden within this small cavern.

Hidden in the Santa Ynez Mountains off Highway 154, this tiny restaurant once served as a stagecoach stop.