An alien church provides much needed silence in the midst of a Finland shopping center.

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

An abstract monument to a symphonic composer.

The Guardian of Tallinn.

The oldest continuously operating pharmacy in Europe.

Copenhagen's celebrated theme park and gardens.

Rich with fauna and flora, nature-lovers can walk across the sea at this UNESCO World Heritage spot.

The former headquarters of history's oldest megacorporation.

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

A hidden church in a hidden courtyard tells the story of the Miracle of Amsterdam.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

The attic of a four-century-old canal house hides a clandestine church.

Amsterdam's narrowest house facade is a monument to 17th-century tax evasion.

A floating cat sanctuary on an Amsterdam canal.

This towering church is home to a world-famous organ and a treasure trove of medieval art.

Unsurprisingly, Holland is home to one of the most magnificent flower gardens in the world.

A trio of red, white, and blue stones embedded in the streets of Leiden are markers of medieval territory and law.

An ancient Egyptian temple sits within a modern European museum.

The works of poetry's biggest names grace the walls of the city of Leiden, all carefully painted by hand.

A 'living museum' in Leiden, the oldest of its kind in the Netherlands.

A little sculpture with a large wardrobe.

One man's remarkable private collection of art from around the world.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

One of Antoni Gaudí’s earliest buildings, built between 1886 and 1890 for the industrialist Eusebi Güell.