A Maryland museum dedicated to Black history, housed in a historic church.

Surrounded by traditional homes, this Tolkien-esque dwelling stands out on a quiet street in suburban Maryland.

This massive swimming pool is the high tech home to the human-powered submarine races.

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

The 72-foot giant escaped confinement in a large patch of mulch only to be reburied in the sandy shores of the Potomac River.

An unusual sculpture, an interesting history, in a strange place, for a good cause.

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

A suburban museum tells the story of a historic transportation network and even provides rides in antique trolley cars.

A swimming hole in the historic industrial quarry that supplied the marble for the Baltimore Washington Monument.

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

This historic lighthouse was well known for the large number of women who served as its keeper.

Giant acorn-shaped 19th century gazebo from which suburban Washingtonians gazed upon the original "silver" spring.

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

A mammoth pair of Civil War artillery guns abandoned out in the forest.

The stone marker that Mason and Dixon placed at the eastern end of the famous north-south border they surveyed.

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

The likeness of the Baltimore music icon was unveiled in time for the anniversary of his Senate hearings on music censorship.

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

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

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

America's first nuclear-powered merchant ship is now a time warp to the atomic age.

The whole world in one water tank.

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

One of the oldest anatomical theaters in the U.S. still in use was once the site of an infamous cadaver riot.