The rogue roots are gradually consuming some of the historic marble grave markers.

This site is believed to be connected to the oldest house in Arlington County.

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.

This general store is more than a century old and home to various oddities and antiques.

Endless rows of boxes of paper records line the hallways of the archaic federal facility where guns are traced.

The school tested mustard gas for the U.S. Army during World War I.

Bizarre Cavern.

Built by the patriotic residents of Boonsboro in a single day.

One of the only memorials dedicated to journalists who died in combat.

The ruins of an old mill lie in a small ravine along a hiking trail near Little Seneca Creek.

Three abandoned missile silos are hiding in plain sight behind a suburban development in Maryland.

The final resting place of the tragic king and queen of the Jazz Age is tucked away in a small Maryland graveyard.

This former POW camp was transformed into a Cold War missile installation.

The "first cat," "first dog," and even a presidential pygmy hippo all get their due in this museum.

Rediscovered after a century, the father of the American Navy was reinterred in something dredged up from Davy Jones' Locker.

This statue honors the author's groundbreaking family story.

A quick journey through the history of Annapolis.

This memorial honors five journalists who were killed in a mass shooting in 2018, and affirms the importance of the first amendment.

Just outside the Naval Academy, Hell Point is a historical marker that could easily be the point where failed students wait for the bus.

This 16-foot, intricately detailed model of the Gearing-class destroyer has been called the most detailed model ship ever built.

The oldest military monument in the United States.

A total of 14 men held the title of "president" before George Washington—their historical legacies are enshrined in the lobby of a hotel.

A touching tribute to a local hero who made sure his neighborhood stayed clean.