The design of this beautifully crafted building was inspired by Norwegian glaciers.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

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

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.

Every Tuesday, students let off steam by screaming into the night air.

A man has revenged his true love's betrayal through tears and stone genitalia.

A miniature statue of a beloved character from children's literature.

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.

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

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

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

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

This small museum nestled inside a souvenir shop is dedicated to Sweden's most well-known toy.

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.

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

This Stockholm light tower can be controlled by anyone with a smartphone.

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

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

The art museum is decorated with creatively remodeled pre-Nazi swastikas.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

The only surviving piece of Copenhagen's 16th-century defensive wall.