One of Europe's oldest libraries.

At just 51 feet and 10 inches long, it's the shortest street in England.

J.R.R Tolkien, C.S. Lewis, and other "Inklings" met at the Oxford pub to discuss the now legendary fantasy stories they were writing.

All unmarked mute swans on the Thames are owned by the Queen per a tradition that began in the 12th century.

This preserved puppy was an adorable beacon of charity.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

Paris' fabled purveyor of exotic taxidermy and natural history curios.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

A series of abstract, silly sculptures represent the works of a great modern classical composer.

The largest crypt ever constructed in France was built in the 11th century on an ancient Druid sacred site.

Lyon's miniature version of the Eiffel Tower was built as a statement in support of French secularism.

This plaza is home to a number of works, including Montpellier‘s own Arc de Triomphe.

Abandoned railway line circling the city of Paris.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Nordic giants resurrected from the sea and restored to their former greatness.

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

The bears of Bern have been a city highlight for over 500 years.

Now harmless, this looming post struck fear into the heart of medieval troublemakers.

Where once there was a train station bathroom, there is now this German burger joint.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

A serene space tucked amid the skyscrapers of Hong Kong's bustling financial district.

The once highest point in China blends symbolic design with a kick of adrenaline.