This giant crucifix is like U2's Joshua Tree for Swedish death metal fans.

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

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

This gem from the industrial age helps visitors and residents alike traverse hilly Stockholm.

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

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.

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

This statue and park honor the Swedish chemist Jacob Berzelius, one of the founders of modern chemistry.

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

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

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

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

There are hidden patterns on the subway seats of some Stockholm metro cars.

A miniature model of the iconic Stockholm department store.

Small Easter eggs are hidden in the ventilation holes of the city's newest trains.

Eat a Nobel banquet from any year in the basement of Stockholm's City Hall.

An abstract representation of weather in Sweden.

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

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

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

These airport hangars are now a bustling shopping center with only hints of its past still lingering.

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