A double agent hid information for the Soviet Union beneath this bridge for more than 20 years.

This colonial tavern played host to George Washington, Thomas Jefferson, and other famous early Americans.

This stately building in Alexandria, Virginia was built by Freemasons to honor one of their most famous members.

The eerie ruins of a remote abandoned hamlet said to be founded by the survivors of a shipwreck.

The Grand Ole Opry's big voice came from a small home in rural Virginia where she was eventually buried.

An eight-sided home built during a brief octagon craze in the 1850s.

An extensive, if one-sided, history of U.S. law enforcement's war on drugs.

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

At 207 feet, one of the world's longest continuous escalators.

This statue is dedicated to Grace Sherwood, the last person in Virginia to be convicted of being a witch.

This pre-Revolutionary War grist mill ground corn and flour for soldiers in seven American wars.

This unique historical monument features large concrete spheres designed to resemble fallen stars.

The narrowest house in America is seven feet of pure spite.

Lines from a walking song are etched into a rock in Natural Bridge State Park.

This Virginia railway overpass is said to be haunted by a serial killer in a rabbit costume.

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

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

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

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

Outsider art meets paleontology at this roadside reptile repository.