This limestone outcropping was once a ceremonial site for ancient Native Americans.

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

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

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

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

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

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

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

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

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.

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.

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

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

Home of an evil witch famous within southern folklore.

A historic dam made famous for its turbines and feature in a Hollywood classic.

The cruel trial of a 13-year-old boy inspired the creation of this now abandoned reformatory.

An eerily abandoned stone tower is all that remains of a demolished dam on Cape Fear River.

Ruins of an American Civil War iron forge still survive today.

The remains of the iconic train crash from the movie The Fugitive can still be found rusting along the Great Smoky Railroad.

A historic covered bridge, only one of two remaining in North Carolina.