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.

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.

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

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.

Legend says this little-known stone circle is formed from people petrified as punishment for dancing on the Sabbath.

This tower was constructed to commemorate the man who helped bring true democracy to the United Kingdom.

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

The Swedish flag over this small naval fort signals that the nation is at peace.