FDR's Art Deco hospital tower was hopelessly inefficient.

A historic cemetery filled with quirky faux wood art and unique tombstones.

The United States' oldest Episcopal church still in active use.

Proto-CIA agents trained with grenades in the sand traps and fired machine guns from the fairways.

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.

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

The rooster who crossed the road lives on forever in Takoma Park, Maryland.

Maryland's first (and last standing) toll house on America's first federal road established the state as the "Gateway to the West."

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

The development and impact of electronic media showcased in a picturesque farmhouse in Maryland.

Historic home of America's sweetheart sharpshooter, Annie Oakley.

The antique hotel still has a jail in the basement, though the cockfighting ring is long gone.

Remains of a historic fountain that was mysteriously lost in the demolition of a D.C. traffic circle.

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

Politicians, bureaucrats, and military officers gathered in this field near the Capitol to settle their disputes with blood.

A labor of love built by local hang-gliding enthusiasts, this ideal launch spot was outlawed by the authorities and has since been largely abandoned.

A remarkable time capsule of American manufacturing deep in Maryland coal country.

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

A pre-Industrial Age iron furnace and the site of a nearly-forgotten piece of Black history.

A haunting exhibit in a wildlife refuge center highlights threatened species and the conservation efforts needed to save them.

This former asylum for Black Americans is haunted by its history of violence and racism.

This fort down the Potomac from Washington, D.C. was once the only defensive fort protecting the capital.

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