Elvis's own personal tropical hideaway.

A delightful park featuring homemade scale replicas of dinosaurs, tucked away in the Tennessee mountains.

This award-winning men's bathroom was just too beautiful to not allow women to see.

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

Over 20,000 sets of spice shakers reveal the surprisingly telling history of our most basic spices.

The first full-scale tunnel built in America is short but scenic.

Live long and prosper in Tennessee.

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

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

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

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.

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

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

More than five miles of underground passageways.

Visit this playground of waterfalls, caves and sinkholes.

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

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

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

The secret city built by the Manhattan Project.

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

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

World's largest collection of Coke-related items not held by the Coca-Cola company.

A curiosity-seeker's paradise set inside a three-story historic school house.