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

This natural wonder drops 16 stories straight down through rare flora and streaming waterfalls.

This ranch house in Jackson's Elraine neighborhood was home to the civil rights icons and the site of a shocking assassination.

This humble hole-in-the-wall is home to an incredible pig ear sandwich and serious civil rights history.

This iron and wood Civil War city-ship was the first vessel to be sunk by an electrically detonated torpedo.

The second-largest ceremonial mound in the United States is an artificial hill that is loosely shaped like a pentagon.

Walk through row upon row of manicured miniature trees at the United States' largest bonsai nursery.

This two-room shotgun shack in Tupelo is the birthplace of a King.

An eerie and beautiful group of columns mark the site of a grand mansion lost to time and fire.

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

Follow the steps, and this roadside artwork will teach you how to dance.

The bad-ass ride of a soul legend, housed in one of the world's few soul museums.

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

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.

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

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

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

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

More than five miles of underground passageways.

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

A preserved stretch of ancient fossilized trees with an impressive gem collection to boot.

A half-mile long and three stories high, this bridge over the Des Moines River Valley mimics a descent into a mine shaft.

Millions of dollars worth of sculpture decorate this Iowa city center.

This simple home was the beginning of a long journey for the iconic Western film star.