Little Red Lighthouse under the George Washington Bridge.

Mysterious 500-year-old tapestries depict a unicorn hunt.

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

This peaceful Massachusetts graveyard was one of the first "garden-style" cemeteries in America.

The former home of Samuel Clemens and family remembers the happiest period of the author's life.

A former copper mine which became a truly unsuccessful prison.

A treasure trove of rare and fine fabrics from around the world.

Founded by the famed children's book artist, this museum spreads an appreciation of the arts through picture books.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

Built hundreds of years ago this downtown iron barrier once protected a much despised king.

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

Sniff the Titan Arum's rotting flesh.

In its day this historic fort held 100 cannons pointed in almost every direction to protect New York.

This ruined fort hidden at the top of Central Park can't seem to keep from losing its historical plaques.

Lie in a hammock where George Washington stood.

A crumbling hospital from the 1850s on Roosevelt Island.

Beneath the mossy overgrowth covering this once-sprawling campus lies decades of history and the secrets that come with it.

What was once a trend-setting, phrase-coining icon of architectural splendor is now a rotting, forgotten hulk.

Officially named the "Loneliest Road in America," this barren stretch of Nevada road offers almost nothing but sky and open fields.

Books you don’t need in a place you can’t find.

Mass Grave of 48 colonists killed in a raid by Native Americans and the French in 1704.