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

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

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

This "Plant Farm Museum" is home to the divinely inspired and visionary outsider artwork of Reverend Howard Finster.

A bizarre roadside attraction and the first instance of miniature golf in the world.

More than five miles of underground passageways.

The longest non-mortared wall in the country is one man's tribute to his displaced Yuchi ancestor's five-year journey to her homeland.

Famous for its bio-luminescent inhabitants, known as "dismalites."

The former home of the 11th president of the United States.

148 feet long and in the middle of a verdant forest.

Underneath this water pump, Annie Sullivan helped Keller speak her first words.

A modest Alabama recording studio where some of music’s biggest voices found their sound.

In Rickwood Caverns, visitors can travel hundreds of feet underground and see beautiful formations unique to the region.

An ancient cave system in Tennessee’s Appalachian foothills converted to a 1,200-person music venue.

This stone incorrectly marks the 35th parallel, causing some territorial kerfuffles.

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

The pan man stands as a testament to the functionality of American cast iron cookware.

A natural sandstone bridge hidden in the Sewanee forest.

A miniature city built by a single hunchbacked monk.

One person’s lost luggage is another person’s treasure.

This massive cave is a sight to behold.

It may look like no more than a full-scale model, but every part of this full Space Shuttle stack had a working role in aviation history.

The quiet resting place of a rock and roll legend.

A propulsion engine testbed that paved the way for the Space Shuttle launch sits without recognition at this rocket center.