This artificial cave looks like something out of a fairytale.

A giant interactive periodic table with real samples of the elements.

A controversial artwork draws attention to the dark history of Prague's "Suicide Bridge."

Street artists transformed an abandoned air vent into the beloved Star Wars robot.

Established in 1937, the oldest candy shop in New York City boasts a rainbow-colored inventory that would make Willy Wonka envious.

The seaside ruins of an ancient salt production facility.

This ambitious restaurant celebrates the culinary traditions of the Ozarks before 1870.

The remains of the medieval wall that once surrounded Paris with ties to the construction of the Louvre.

The helicopter that "Tricky Dick" absconded from the White House in on his last day in office.

A 30-foot-tall cement chair pays tribute to a historic design and a local industry.

The legacy of a wealthy executive and his wife, this little-known art museum features works by Picasso, Monet, Renoir, Cezanne, and more.

Located close to a movie studio lot, this restaurant has a long history of star-studded patronage.

The site of slaughterhouses that once satisfied Parisians' taste for horse meat is now home to a park and book market.

A tunnel that brings more than a century of history to life from the deepest parts of the Niagara Gorge.

An intricate network of underground tombs carved into volcanic rock.

The White House Situation Room was taken apart in 2006 and shipped to the Ronald Reagan Presidential Library.

Perhaps the most scandalous statue of America's first president.

The story behind this beloved toy—named for Theodore Roosevelt and owned by his grandson—is more complicated than you might guess.

Sip creative cocktails in the former vault of the Riggs Bank.

Beneath unsuspecting visitors feet, a capsule containing pieces of America’s civil rights history.

This bridge over D.C.'s Rock Creek Park is sometimes called the "Buffalo Bridge" because of its four buffalo sculptures, which were cast from a single piece of bronze.

Volkswagen's dedicated museum dives into the complex history of one of the world's best known cars.

Buddha figures are carved into volcanic rocks on the seashore of Yamagara Prefecture.

An early 20th-century fire lookout, still in intermittent use, preserves legacy fire-locating equipment.