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

Enormous ants wielding giant pine needles guard a Stockholm real estate company's office.

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

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

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

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

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

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

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.

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

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

One of the world's few mounted blue whales, its jaws are hinged open allowing visitors to descend into a lounge.

These waste baskets play a few risque messages to discourage littering.

This millstone commemorates a gruesome tale that may have been the source of the city's name.

This poignant sculpture of a gnarled weapon is a symbol of non-violence.

This chimerical bridge/tunnel appears to dead end right into the sea.

This contemplative sculpture made out of old machine parts is meant to be the first in a series of sculptures around the world.

The house where a Danish physicist discovered the connection between electricity and magnetism.

Once a meeting point for great thinkers, and the midpoint of the country.

This pair of gilded girls atop an Art Deco building in Copenhagen were built to function as a weather indicator.

Site of the first radio and telephone broadcasting companies in Copenhagen.

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

An old Danish political institution where members of government can grab a drink off the record.