Tucked away in a downtown Stockholm park are the remains of a World War II defense position.

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

A former suicide bridge is now accumulating symbols of love instead of a body count.

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

A Stockholm metro station is home to an escalator that is not only the longest in Sweden, but among the longest in the world.

Located in an old church, this brewery produces a different kind of holy water.

This unique sculpture is often overlooked by pedestrians.

Street artists transformed this abandoned industrial neighborhood into one of Europe's largest graffiti exhibitions.

A plaque marks the house in Stockholm where the French philosopher René Descartes lived up until his death.

Dine on food tied to Viking history and legend at this subterranean Stockholm spot.

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

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

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

A 130-year-old urinal is the oldest of Stockholm and perhaps all of Sweden.

Several cannonballs of mysterious origins decorate two buildings in Stortoget's main square.

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.

What looks like a birch tree smushed between two pieces of glass often confounds commuters.

A golden plaque marks the site of the mysterious unsolved assassination of the former Swedish prime minister.

Breathtaking and huge 430 year old maps of Italy.

One of several skulls claiming to belong to the beheaded St. John the Baptist is on display at this Roman church.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

This hidden alley near the location of Rome's first theater was the site of a curious miracle.

A deep mark on the remains of a Roman temple, believed to be left by a legendary warrior.

The remains of this 2nd-century Roman temple are incorporated into a modern building.