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

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

One of the last active volcanoes on the Eastern seaboard.

The only recreation of William Shakespeare's indoor playhouse.

This historic mansion was built as a symbol of love between a husband and wife.

The resting place of a Civil War celebrity's amputated limb.

This maze-like slot canyon is a unique gem within an already fascinating geological area.

The skeletal white beams stand as a monument to religious dissent.

This 29-ton granite ball spins around at the slightest touch thanks to a scientific phenomenon.

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

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

The flower-shaped temple in Virginia aims to transcend the boundaries of the world’s religions.

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

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.

This museum devoted to the gothic author holds such interesting ephemera as his socks and walking stick.

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.

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

An isolated island home to one of the oldest English-speaking communities in the region and Maryland's state dessert.

This 1830s store is believed to be the site of Harriet Tubman's first stand.

A relic of FDR's brief foray into utopian urban planning.

This suburban house is made of dirt, and almost sparked a revolution in home construction.

This beautiful stone arch bridge wasn't even expected to stand for one day, but people have been crossing it for centuries.