This little brick tunnel built by Confederate forces was used to conduct surprise attacks on the railroad.

A late-night restaurant empire was launched from this humble storefront.

The first KFC is on the National Register of Historic Places.

A cannonball from Union forces battling John Hunt Morgan made this church a permanent home.

Hidden amid a collection of trails is the site of a tragic crash.

Inside this old train depot resides a multi-line model train covering western North Carolina.

An eerie site of reverence for those who have completed an epic journey.

Nine of the very few concrete ships ever made in the U.S. are beautifully decaying off a Virginia pier.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

Exact replica of the ancient monument, but much, much lighter.

A secretive collection featuring objects that were designed specifically for U.S. intelligence operations.

Outsider art meets paleontology at this roadside reptile repository.

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

The remains of a failed attempt at medieval nerdery are hidden deep in the woods of Virginia.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

A 200-year-old bar is all that remains of one Mississippi River town's rough-and-tumble past.

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

This monument to the victims of a tragic explosion is said to turn and look at passing cars.

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

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

A grandiose octagonal home crowned by a large dome stands out among the antebellum mansions.

Built following the War of 1812, this fort has withstood hurricanes for centuries.

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.