An ancient Viking runestone hidden in plain view in Stockholm's old town.

A man has revenged his true love's betrayal through tears and stone genitalia.

This homeless brass fox tugs at your heartstrings from the foot of a Stockholm bridge.

Stockholm's deepest subway station is also a stunning ecological wonder.

This Stockholm light tower can be controlled by anyone with a smartphone.

The library's graceful rotunda is like a bibliophile's temple.

Sweden's first nuclear reactor, R1, can be visited 25 meters underground.

A hidden bathhouse in one of Stockholm's oldest and busiest neighborhoods is open to anyone who can find it.

The world's largest model of our planetary system.

It houses the remains of a 17th-century version of the Titanic.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

A 400-year-old mummified arm dangles from the ceiling of St. James the Greater, serving as a warning to thieves.

One man's personal collection of KGB memorabilia is presented along with his strange viewpoint.

This walkway is so narrow it needs its own light to stop pedestrian traffic jams.

A series of playful yellow penguins share a serious message about the environment.

This mundane post marks the old location of the city's main postal hub.

Summer in Scotland begins with a spectacularly wild and colorful event rooted in ancient pagan traditions.

Near the former site of numerous witch burnings, this lavish Edinburgh mainstay pays homage to Scotland's brutal history.

There are plenty of wonderful panoramic vistas in Edinburgh, but not many are hidden smack in the middle of the Old Town.

This Parisian café sticks almost exclusively to an ethos of reuse.

Indents in the pavement are all that remain from a grisly death machine in Paris.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

A museum of magic with a Sadist past.

Abandoned railway line circling the city of Paris.