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

This replica of the Greek structure is in the heart of Nashville.

When Motown musicians came to Nashville in the 1960s they stayed at this historic record-pressing company because hotels wouldn't host them.

The small cave that housed Tennessee's "first citizen."

All you ever needed or wanted to know about America's favorite whiskey, but not a drop to drink.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

More than five miles of underground passageways.

Labor provided by Great Depression-era programs restored these 25,000 acres in Tennessee.

Visit this playground of waterfalls, caves and sinkholes.

This bridge is haunted by the ghost of a distraught mother.

The U.S. Supreme Court's secret Cold War relocation facility in the mountains of North Carolina.

Traditional Appalachian dances such as the Georgia Rang Tang and the Shoo-Fly Swing are kept alive at this weekly event.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

Hikers can still stroll beneath the long conveyer of this abandoned mining facility hidden in a West Virginia river gorge.

Once connected to the outside world by a single train track, this ghost town is looked after by the National Park Service.

America's post-nuclear-attack chambers of Congress.

Andy Griffith's hometown has made itself up to look like the fictional town of Mayberry.

A former mental hospital founded in the 1930s by a eugenicist who advocated for the forced sterilization of patients.

Bubbling up from deep underground is the warm crystal clear water that fills the Warm Springs Pools, America's oldest spa.

A particularly creepy abandoned hospital that sparks interest for lovers of the supernatural.

Take a steam-powered ride straight out of the past on this Appalachian rail line.

World's first "penitentiary," meant to be humane, drove men insane.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.