Legend has it this spring formed at the spot where a medieval Swedish king was killed.

The apartment where Pippi Longstocking came to life.

The scars of a remarkably organized public protest to save 13 elm trees are still visible in this Stockholm park.

After a water tower painting was accused of being an ad, a simple fix was made that gave the city a motto.

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

Hidden in plain sight, Sweden's official ordnance datum is now abandoned.

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.

This centuries-old rooster survived a devastating fire.

Sweden's oldest animated sign is still lighting up the skyline today.

The discovery of an old wall led to the creation of this fascinating museum about the city in the Middle Ages.

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.

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

A wooden street sign is the last remnant of this 400-year-old alleyway.

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.

The second oldest anatomical theater is housed in a museum of curiosities.

18th century opera in its original splendor.

An abstract representation of weather in Sweden.

A miniature model of the iconic Stockholm department store.

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

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

A king's bloodstained shirt is among the gruesome collection of artifacts displayed below Stockholm's Royal Palace.

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