Mile-long cave system near Great Smoky Mountains.

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

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

Enormous lake at the bottom of a unique cave system.

Live long and prosper in Tennessee.

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

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

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

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

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

One man has spent decades faithfully constructing this unique brick and cinderblock castle.

In one of America’s oldest mountain ranges, a long-awaited section of a scenic highway is now open to the public.

This historic train station has been converted to a locomotive themed hotel.

This former maximum-security prison is creepy, sobering, and supposedly haunted.

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

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

Once decrepit and slated for demolition, now one of the longest pedestrian bridges in the world.

Abandoned for 60 years, this submerged bridge was completely forgotten until the lake was drained.

This simple, broken column marks the final resting place of one of America's most famous explorers.

This stone memorial pays tribute to a massive shipwreck which was sadly overshadowed by the death of John Wilkes Booth.

One man’s religious convictions led him to build this stone castle meant to withstand an apocalypse.

A key producer of charcoal iron in the early 1800s, the structure still stands today.

While knives are the main feature in this store, visitors will also find dinosaur bones and meteorites.

This museum pays tribute to the Cherokee leader who created a written language for his people.