More than five miles of underground passageways.

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

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

This Tennessee museum is dedicated to a tragic railroad hero who inspired the famous ballad that bears his name.

Mysterious library of an infamous financier and spiritual seeker.

Hiding behind a grocery store is a spectacular cavern carved as part of an old limestone quarry.

Crumbling Kennedys and a decaying Tecumseh are just some of the haunting remains of one man's cement art trail.

The grave of America's 11th president is not in some grand monument but instead it's hidden away on the grounds of the Tennessee Capital.

Over a dozen Native American earth mounds dating back over 2,000 years dot this Tennessee archaeological park.

Live long and prosper in Tennessee.

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