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

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

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

A recreation of the doomed ocean liner in the middle of the Smoky Mountains.

This funicular railway rumbles along for a mile up the nearly vertical face of Chattanooga’s Lookout Mountain.

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

Walk the whole Mississippi River!

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

This head-spinningly bizarre Depression-era art cave is wall-to-wall quartz and Jesus.

More than five miles of underground passageways.

The secret city built by the Manhattan Project.

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

Wild lights and sound effects turn a walk through some caves into an eye-popping 1960s tourist attraction.

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

Home of an evil witch famous within southern folklore.

Better known as the "Body Farm," this unique research facility has been studying how human bodies break down since the 1980s.

Enormous lake at the bottom of a unique cave system.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

A museum to a cave explorer whose tragic death was a media sensation, and whose corpse became a tourist attraction.

View Kentucky's beauty and history from the perspective of painter John James Audubon, author and illustrator.

A life-sized recreation of the megafauna that once roamed this region is a feature at the birthplace of American paleontology.

A ceramic-tiled room at the Seelbach Hotel said to have secret tunnels used by Al Capone and a crowd that helped inspire F. Scott Fitzgerald's 'The Great Gatsby.'

A unique home built by Andrew Jackson Caldwell that also served as a military hospital.

A collection of outdoor art by renowned muralist Robert Dafford depicts the history of a flooded city.