A former pillar of the Black community in Ellicott City.

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

A priceless collection of the Nation's cryptologic history.

This Georgian-style house built in 1746 is the oldest surviving structure in Bladensburg.

George Washington once stopped by this house for dinner.

A historic cemetery with unique artwork, a Civil War fort, and also happens to be the site of the Battle of Bladensburg.

An intricately designed junk art house with four extravagant junk art cars hidden in the suburbs.

A haunting tribute to pioneering photographer Clover Adams.

A tribute to the beloved, kind-hearted "homeless mayor" of Silver Spring.

Concerned residents saved this historic house and garden from demolition.

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

A Civil War fort in the middle of Washington, D.C. has been swallowed by a forest.

The only Civil War battle in Washington D.C. took place near this highest natural point in the city.

The Conduit Road Schoolhouse is one of the last one-room schoolhouses remaining in Washington, D.C.

A rare example of a rural school in Washington, D.C.

The headquarters of the Audubon Naturalist Society is a small slice of heaven for nature lovers.

A girls' boarding school inspired by the Chicago World's Fair, once abandoned, now restored to strange and scenic glory.

An astounding collection of medical specimens, including bits of President Lincoln.

Hidden within an idyllic suburban garden is a memorial dedicated to the victims of a terrifying spree of killings committed on U.S. soil.

Dogs, cats, horses, monkeys, frogs, and fish are laid to rest at the second-oldest pet cemetery in the U.S.

This general store has stood in the same spot for well over a century.

Walk a trail through a historic Quaker town that outlawed slavery in 1777 and was a major waypoint on the Underground Railroad.

This bell is one of the last remnants of the lost city of Triadelphia.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.