135 bronze medallions mark a French meridian line which once rivaled the hotshot Greenwich timeline.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

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

This demon atop the Notre-Dame de Paris looks utterly bored.

This 18th-century sundial was designed to calculate the date of Easter each year.

A beautiful Victorian statue shows France's enduring love of the rhinoceros.

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

The narrowest street in Paris.

This emotive sculpture was originally created for the 1878 World's Fair.

An immersive projection art installation uses sound, scale, and light to take visitors inside classic works of art.

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

Bursting forth from a historic German neighborhood, these day-glo palaces are now a bright fixture in the town.

Amsterdam's former hotspot for public executions and dissections.

One of Amsterdam's narrowest houses is located right across the canal from its widest.

A beautifully eclectic mix of architectural styles.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

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

This historic Amsterdam bar used to accept sailor's monkeys as payment.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

Museum preserving torture methods from the past.

Poetic, metallic giraffes adorn a square off an Edinburgh thoroughfare.

A striking glass tribute to two sisters who suffered during Scotland's "Killing Time."

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

This site contains overlapping ancient graveyards that existed about 1,000 years apart.