It is said that each of the white stones in the red facade of this medieval house represents the head of a murdered Swedish noble.

Stockholm's tiniest statue is of a small boy looking at the Moon.

One of the world's first dedicated bank buildings in the world is now the oldest one.

Stockholm's narrowest alley is barely over two feet wide.

Outside a Viking museum sits a modern-day runestone made by a Swedish runemaster using traditional methods.

A concrete mushroom that divided Stockholm residents for nearly a century.

Sound travels strangely in this underground whispering gallery.

Despite being burnt down multiple times, the ruins of this South Carolina church are still standing.

This automated sculpture of two men peeing will spell out text messages with their micturition.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

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

A significant example of Czech cubist architecture—a style you won't find anywhere else in the world.

A quasi-futuristic roof sits atop a medieval Bohemian monastery damaged during World War II.

This nine-story building can be played like an instrument.

Bullet holes in the church wall are a reminder of the violence that followed the assassination of a high-ranking Nazi officer.

The first museum in the world devoted to sexual gadgetry.

Macabre astrological automaton clock dating to the late 1400s.

This spooky statue sits outside a famous Prague theater.

When a medieval fire claimed the original St. Stephen’s Cathedral, it sparked a pattern of unquenchable organ building.

The site where Poe "in great distress, and ... in need of immediate assistance" likely died.