Two stone columns flank the grand Venice square, but there were supposed to be three.

A new sculpture calls attention to climate change in the centuries-old city it threatens.

France's most famous cemetery, with some of its most curious tombs.

The Argonaute submarine was the French navy's pride and joy in the 1950's.

This structure atop a craggy cliff in one of the most beautiful parks in Paris boasts an unbeatable view.

A mud statue stands in the dark tunnels, seeming to hold up the weight of the city above.

One of the oldest medical collections in Europe focusing on rare surgical instruments.

The video game-themed street art first popped up in the French city.

The narrowest street in Paris.

The celebrated eyesore created by starry-eyed sweethearts.

If you look closely at the oldest bridge in Paris, you might notice hundreds of ugly faces leering from its sides.

Notorious artist squat renovated into legal studios.

A favorite Paris bar for U.S. expats, including Gershwin, Hemingway, and James Bond.

This museum housed in a former brothel explores the past and present of sex work in Amsterdam.

The history and future of cannabis.

An architecturally unique lighthouse that had to be lifted up and moved to avoid falling in the sea.

Life-size bronzes of the Grinch, Cat in the Hat, Yertle the Turtle, Sam-I-Am, and the Lorax—and the author himself.

The ruins of an abandoned 18th-century town that is slowly being reclaimed by the forest.

Public outcry led to this bridge's unique character which celebrates a giant frog battle and also sewing.

This mysterious artificial cave has long puzzled New Englanders.

This unassuming tree stump reportedly traces its roots to the famous pharaoh queen's reign.

Former villa and estate of James Deering developed to preserve native tropical forests.

St Bernard de Clairvaux Episcopal Church, better known as one of the oldest European buildings in the Western Hemisphere.

A castle built for love, and abandoned due to heartbreak.