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.

Architecturally stunning library serves as the hub of Finnish scholarly life and culture.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

A Scottish manor with a history of mysterious fires, magic, and eccentric tales

The world's only museum devoted to the wonders of fluorescence.

These mysterious Viking chess pieces spent centuries hidden on a remote Scottish island.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

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

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

France's most famous cemetery, with some of its most curious tombs.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

In this cobwebbed old operating theater, you can practically hear the screams of the unanesthetized patients.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

A cluttered and astounding collection of antiquities and curiosities.

This luxury shopping lane has been protected by its own tiny police force for over a century.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

This artist's home turned gallery/museum preserves the creator's love of "Eastern" influences.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.