The oldest operating pharmacy in the world features 800-year-old recipes.

A memorial in the Tiergarten is a reminder of the suffering inflicted on homosexuals by the Nazi regime.

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

The dance of this huge clock is a magnificent and eerie commentary on good and evil in the history of humankind.

These steps offer a breathtaking view of one of Europe's most besieged fortresses.

Touching this 18th-century Scottish philosopher’s toe allegedly conjures good fortune.

Remnants of the 16th-century defensive wall still stand unassumingly within Edinburgh.

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

The taxidermy remains of the first mammal ever cloned from an adult cell are on display in Edinburgh.

There are plenty of wonderful panoramic vistas in Edinburgh, but not many are hidden smack in the middle of the Old Town.

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

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

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

Macabre astrological automaton clock dating to the late 1400s.

Romans decided this 16th-century "talking statue" was so ugly, they named it after a primate.

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

A slightly creepy gallery of plaster cast models in the same museum as Michelangelo's David.

Go inside to really appreciate this 500-year-old technological masterpiece.

This small, ingenious cannon once helped regulate Parisian life.

The video game-themed street art first popped up in the French city.

This surreal statue brings a famous French novel about a supernatural cad to arresting life.

In the best of all possible worlds, everyone will get a chance to see this statue in which Voltaire's heart is interred.

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

This narrow Ghent alleyway is an officially sanctioned street art tunnel.