A tombstone on the grounds of the royal castle marks the burial site of a Swedish king's beloved dog.

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

It's always game time at Stockholm's only museum devoted solely to video games.

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

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

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

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

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.

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

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

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

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.

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

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

This incredible stone temple is a monument to death, victory, and fantasy architecture.

On the highest peak in the Harz Mountains, science and the occult faced off in a failed attempt to turn a goat into a boy.

This German monument honors the so-called "Prince of Mathematicians."

Bursting forth from a historic German neighborhood, these day-glo palaces are now a bright fixture in the town.

Florentine Renaissance style building in Switzerland, home to the world's largest taxidermy Great White Shark.

The bears of Bern have been a city highlight for over 500 years.

This simple apartment may have inspired some of the most important theories in the history of science.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

In one of the world's smallest countries, a royal's personal winery is open to the public.