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

One of the last active volcanoes on the Eastern seaboard.

It marks the spooky spot where the bodies of two young boys were found in the 19th century.

This poignant sculpture of a gnarled weapon is a symbol of non-violence.

This lovely picnic spot featuring thunderous jet landings is an aircraft spotter’s dream.

People escaping slavery may have hidden inside a corpse vault.

The early data processor factory founded in Washington for the 1890 U.S. Census went on to become IBM.

‘Bush the old fire dog died of poison July 5th, 1869. RIP.’

The Byzantine, pre-Columbian, and medieval art at this stately mansion are some of the most under-appreciated collections in D.C.

A men’s restroom became a sandwich shop.

Behind an abandoned storefront is an example of pioneering 1930s gas station architecture.

Was there a small "backpack nuke" hidden in the attic? JFK apparently thought so.

A bas relief commemorates the "Nuns of the Battlefield" who cared for soldiers on both sides of the conflict.

An eerie, decaying ghost town destined to fade into the forest.

Taste the white whiskey that the United States' first president once distilled and enjoyed.

The graveyard holding the remains of George Washington's slaves was forgotten for nearly 200 years.

The tomb was guarded by soldiers from both sides of the war, and some left their initials carved in the brick.

A somber monument commemorates the site of a Native American reservation marked by suffering.

Two dozen pinball games hidden away inside a most unlikely location.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

The final resting place of the living embodiment of the famous Forest Service symbol.

A celebrity from the late Cretaceous period.

This modern castle sat empty for decades before a fire inspired its builders to complete its luxury halls.

The history of whiskey and all of its boozy glory, from Colonial days to modern American cocktail culture.