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

This millstone commemorates a gruesome tale that may have been the source of the city's name.

This poignant sculpture of a gnarled weapon is a symbol of non-violence.

Home of the Large Hadron Collider and the birthplace of the World Wide Web.

A plain wooden seat that once belonged to one of the most prominent figures of the Protestant Reformation.

One of the longest wooden benches in the world snakes around Geneva's Treille Promenade.

The world's largest second-hand graces a clock surrounded by constantly changing flower beds. 

One of the most historical literary characters continues to stroll his hometown.

An opulent monument built for a duke who donated his entire fortune to the city of Geneva.

Inat Kuća, or "House of Spite," is more than just an oddly named restaurant.

A number of craters left by fatal mortar strikes have been filled with red resin to remember those lost during the Siege of Sarajevo.

This historic cemetery was inaccessible for several years due to dozens of land mines.

The haunting ruins of a military fortress turned astronomical observatory sit on a Sarajevo mountaintop.

A war-torn Olympic relic is being overtaken by graffiti and nature.

Enormous ants wielding giant pine needles guard a Stockholm real estate company's office.

When this 18th-century observatory's meridian was moved, it set Sweden's time back by 0.04 seconds.

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

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 narrowest alley is barely over two feet wide.

This unique sculpture is often overlooked by pedestrians.

A steel paper plane is all that remains of a crashed aircraft that caused an amazingly small amount of damage.

Swedish skyscraper with a 90° twist.

This chimerical bridge/tunnel appears to dead end right into the sea.

These ancient rock graves were featured on the cover of a Black Sabbath compilation album.