The fairy tale castle of the "fairy-tale king."

Baroque celebration of the end of the Great Plague of Vienna.

Op-art architecture designed for happiness.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

Macabre astrological automaton clock dating to the late 1400s.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

Bouncing, delightful, mechanical art at the MIT Museum.

Swiss vineyards in a UNESCO heritage site.

The mark of the Devil's horns on a marble column in Milan.

"The prettiest love letters in the world" ... or so said Lord Byron.

Museum celebrating the ocean, with the largest wunderkammer dedicated to sea exploration.

This massive blockhead sculpture hides an entire library.

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

Home to three historic ships from the age of Vikings.

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

Ancient cliffs resembling a kilt on Scotland's second largest island emit an entrancing sound.

Protecting the dead from opportunistic body snatchers.

A 18th century graveyard and its astonishing cortege of macabre iconography.

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

A church that bred legends, and served as an inspiration for the Da Vinci Code.

The most loyal of little dogs, or a Victorian era publicity stunt?

A church of bones, decorated with 40,000 human skeletons.