One street divides a single town that stands in two U.S. states.

The ruins of this Thomas-Jefferson-designed mansion have been left to crumble since the Christmas Day they burnt down.

The highest point in Virginia can only be reached by passing through ponies and flowers.

A 300-yard long natural tunnel runs through a ridge deep in the Appalachian Mountains.

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

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 "All-Seeing Eye of God" symbol on this library is a clue to one of the many former lives of this building.

A monument marks the location of the first successful steamboat demonstration.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

A full-scale replica of a 1774 colonial settlement in Kentucky.

An enormous goose sits atop this nest-shaped home.

You can climb to the summit of Black Mountain, as long as you sign the waiver.

Origin of the blue-skinned Fugates of eastern Kentucky.

This grave marks the final resting place of a legendary frontiersman... unless it doesn't.

The world's longest known cave system.

This 19th-century building inadvertently preserved the handprints of its builders within its walls.

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

The longest-serving U.S. Secretary of State and Nobel Peace Prize winner was born in this humble cabin.

This hotel was used during the Manhattan Project to house official visitors.

This museum pays tribute to the Cherokee leader who created a written language for his people.

One of the Cemestos prefab homes built to secretly house thousands of Manhattan Project workers.

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