Hidden in plain sight on a gable between two towers on the roof of shipping firm F. Laeisz' headquarter in Hamburg sits an unexpected bronze sculpture.

Hamburgers are intensely proud of their tunnel beneath the river.

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

A collection of noses tucked inside an art museum reveals how times have changed.

Once the world's most modern observatory, this building is now a private school.

This stone obelisk is a relic of the 17th-century Swedish mile markers.

Despite dreams of constructing this fairytale mansion, Albert Gotthard Nestor Cedergren never saw its completion.

A miniature model of the iconic Stockholm department store.

The center of Stockholm can be found along this quiet street.

This small statue hints at the incorrect origins of the lush landscape park surrounding it.

This railroad track was so secretive that it was omitted from all maps.

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

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

An 11th-century runestone decorates the halls of Terminal 2 of this Scandinavian travel hub.

Villas that once served as playgrounds for the rich now fall away in decay.

The Guardian of Tallinn.

Flamboyant architecture from the turn of 20th century.

A statue built to honor the elite soldiers who fought for Latvia during World War I.

This enigmatic artifact remained buried in a churchyard for years.

3,000 market stands in five former Zeppelin hangars.

An abandoned masterpiece of Soviet Brutalist architecture.

These traffic lights celebrate the 100 year anniversary of the women's suffrage movement in Lithuania.

This former KGB building is now a museum memorializing the people who suffered during the Soviet regime.

In the summer, the area around this sculpture transforms into a vibrant concert venue.