On a small island, a replica of a Finnish village from the Iron Age.

An abstract monument to a symphonic composer.

The door to the museum holds a unique artifact from the Finnish Civil War.

In the waters outside Helsinki, a tiny island once used as a military outpost now welcomes visitors.

This church also serves as a lighthouse complete with a beacon.

This irregularly shaped sea fortress has defended not one but three different sovereign states.

A subterranean house of worship carved right out of the bedrock.

Art historians have debated the identity of this medieval stone rider since the 19th century.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

Some believe that the artist behind this whimsical statue inserted his own likeness as a way to discreetly flip the bird.

This magenta statue commemorates the legendary marriage between a mermaid and the city's founder.

The birthplace of Karl Marx is now a museum dedicated to the communist revolutionary's life and work.

The last bastion of Roman presence north of the Alps looms over a German town.

This red light district plaza memorializes the Fab Four and their historic connection to the area.

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.

Once the tallest building in the world, this abandoned church is now a monument to the destruction of WWII.

A wunderkammer of exoticism immortalized by Tom Waits.

Model Trains and Much More in Hamburg.

The oldest surviving wooden bridge over Rhine lets travelers cross easily from Switzerland to Liechtensten.

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

A 200-year-old tavern challenges guests to finish a glass of wine while hanging from a ceiling beam.

One hundred years ago this small house in downtown Zürich became the birthplace of the Dada movement.

This massive boulder was hurled into a Zurich church when a gunpowder depot was struck by lightning in 1652.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.