Kentucky, Tennessee, and Virginia meet at this point in the Cumberland Gap.

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 Arkansas town is known for its gangster history, its healing waters, and now its brews.

Two gushing waterfalls of hot spring water within a block of each other.

This historic hotel on Bathhouse Row in Hot Springs National Park has a storied history of gangsters and baseball greats.

A beautiful South Korean gate and garden in Little Rock honors American Taekwondo.

Art blooms at this unique outdoor gallery along the banks of the Arkansas River.

Yup, that's where the name came from.

The final resting place of the camel who served with the Confederate Army during the Civil War.

The ill-fated plan to reroute the Mississippi so that Union ships could bypass Confederate fortifications on the river bend.

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

This ancient settlement contains some of the largest earthen mounds in North America.

Built by prisoners of war, the largest small-scale model ever built includes eight miles of tiny streams that now sit abandoned.

This 19th-century hotel and spa hosted famous guests like like the Vanderbilt family, William Waldorf Astor, Helen Keller, and Jay Gould.

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

Bananas are often left for the first monkey America ever recovered alive after being launched into space.

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

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

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

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

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

John Hendrix predicted the creation of the "Secret City" built as part of the Manhattan Project.

The secret city built by the Manhattan Project.