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

In the days before house numbers, these colorful signs held clues about various buildings' purposes.

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

It appears as if a man is standing behind this giant airport clock, painting the hands in real time.

The Bloemen Route, or “Flower Route”, stretches 25 miles through prime Dutch tulip country as a result of “tulip mania,” the world’s first economic bubble.

Unsurprisingly, Holland is home to one of the most magnificent flower gardens in the world.

A beautifully eclectic mix of architectural styles.

Created as a punny statement about genetic engineering this monstrous hybrid statue has become a beloved icon.

The Liverpool street made famous by the Beatles is real.

Gutted during the Liverpool Blitz, this architectural husk has been left destroyed in honor of the dead.

The quiet field that inspired one of the most famous songs of all time.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

In the fictional world of Kcymaerxthaere, celestial wonders marked a portal to a powerful route of travel at this site in Madrid, Spain.

Abandoned for decades, trains still pass through the now-restored remains of one of Madrid's first metro stations.

An early Portuguese serial killer's head is alarmingly well preserved in a jar at the University of Lisbon.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

A 125-meter long "tribute to the Brazilian people."

Seven mini rowhouses fill the gap between 54 and 70 Westerstraat.

This unattributed sculpture in Amsterdam is hiding in plain sight.

One part local history, 99 parts gruesome haunted house.

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

Amsterdam's former hotspot for public executions and dissections.

A hidden church in a hidden courtyard tells the story of the Miracle of Amsterdam.