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

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

This defunct, fortress-like prison has been the setting for several movies.

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

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

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

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

Live long and prosper in Tennessee.

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.

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.

At 135 years old and counting, this historic print shop is heaven for poster nerds and music buffs.

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

Mile-long cave system near Great Smoky Mountains.

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

A Memphis park where you can walk the whole Mississippi River in one go.

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.

The secret city built by the Manhattan Project.

More than five miles of underground passageways.

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

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

Unruly residents were housed in this one-person cell until the Black Maria arrived.