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

Dedicated to the explorer who opened Japan to the West.

An ode to Japanese artist Hokusai, with a bit of a comical twist.

The home of the artist credited with introducing the tomato to the American diet.

A single light illuminates one man's overshadowed contributions to street lamp history.

Mysterious stone tower featured in many alternative histories of the New World.

Brass plaques embedded in pavement preserve the memories of those who lost their lives at the hands of Nazis during World War II.

The northernmost point in Denmark is a turbulent sandbar created by two clashing seas.

The final resting place of one of the brightest physicists of the 20th century.

Pre-Nazi swastikas adorn the sculpted pachyderms flanking this brewhouse portal.

The final resting place of the author who gave us the Little Mermaid, the Ugly Duckling, and many more beloved fairy tales.

In downtown Oslo, a menacing and terrifying relief clings to a church wall.

The painter of "The Scream" is laid to rest under a stoic bust of himself in the humble corner of an Oslo cemetery.

This restaurant's specialty is "a major enigma for food historians."

This pair of gilded girls atop an Art Deco building in Copenhagen were built to function as a weather indicator.

Potato-peeling mannequins, Inca art, and a dangling tuber mobile help trace the history of fries at this Belgian museum.

This pub boasts a curious history and may have inspired a Dickens character.

This obscene artwork on the side of a newspaper office pokes fun at a rival paper's former editor-in-chief.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

These former Nazi anti-aircraft towers offer a singular view of the north of Berlin in the summer, and a sanctuary for bats in winter.

This World War II bunker now survives as a documentation of the Nazi regime and war crimes.

A triumphant marble and bronze fountain depicting a 15th-century Hungarian king and his hunting party.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.