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

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

A heated statue pays tribute to one of Sweden's great actresses.

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

Now a hotel, this former bank was the site of a robbery that spawned a psychological phenomenon.

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

On Nobel Street, a miniature statue of Alfred Nobel.

There's something in the air as history repeats itself at this museum dedicated to the Swedish pop band.

Sound travels strangely in this underground whispering gallery.

This grisly exhibit houses skeletons and weapons from a devastating 14th-century clash.

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

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

An abstract representation of weather in Sweden.

The world's largest model of our planetary system.

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

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.

An ancient Viking runestone hidden in plain view in Stockholm's old town.

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.

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

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

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.