This stack of stones honors a murdered 18th-century woman.

The 20th-century chapel’s intricate woodwork includes amazing details, most notably angels playing bagpipes.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

The fountain marks the area where hundreds of accused witches were burned at the stake.

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

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

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

Live data is transmitted from the Atlantic coast to instantly recreate the ocean waves in this fountain at the NOAA headquarters.

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

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

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

An allegorical sculpture in Maryland wears the artist’s politics on its trunk.

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

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

The site of the climactic scene from the classic horror film is now a historic landmark.

Tucked away amidst some of the most famous addresses in the world is New York's only fraction of a street.

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

One of many reminders of Tesla's scientific contributions overlooks the falls which inspired him.

Toxic waste disaster that founded the Superfund program.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

The oldest building in the District of Columbia was preserved because of a mistaken connection to George Washington.