This once-palatial plantation may have been the site where a draft of the Declaration of Independence was written.

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

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

Heron, whitewater rapids, and urban industrialism all add to the beauty of this concrete nature walk.

A railroad tunnel that, upon its completion, was considered one of the engineering marvels of the modern world.

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

Edgar Allan Poe's old dorm is now a shrine to the author's legacy.

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

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

Giant busts of 42 U.S. presidents sit, crumbling in a field in Virginia.

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

The only retired U.S. nuclear missile silo that is open to the public.

The remote outlaw hideout of Jesse James, Butch Cassidy, and the Sundance Kid.

This Wyoming town is fascinated by a particular mythical creature.

A popular rock that acted as a waymarker for American pioneers.

A small town built on an abandoned airfield has former runways as streets and a bar and grill in an old airplane hangar.