A series of sculptures, “sitting” directly on top of Berlin's existing street lamps, addressing the overlooked topic of urban light pollution.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

A statue of an astronomer gazes at the sky as a tribute to Caroline Herschel.

A small hippo-shaped fountain in Berlin, Germany.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

The architect of this fanciful complex called it an "oasis for humanity and nature in a sea of rational houses."

This 17th-century "unicorn" was cobbled together from the skull of a rhinoceros, the legs of a mammoth, and the horn of a narwhal.

An Anatolian immigrant created his own little paradise in the shadow of the Berlin Wall, made possible by the tensions of the Cold War.

One of Hollywood's most iconic actresses was born in an upscale Brussels neighborhood in 1929.

Monastery complex at the location where bodies of the executed Romanov royal family were discovered.

Replica of mosque destroyed by Russia in the 16th century.

This Russian religious complex is a Frankenstein's chapel that includes influence from almost all the major faiths.

Found in the waddenzee, this propeller has been put on public display as a reminder of the Second World War.

Once the grandest synagogue in medieval Spain, it now stands as a memorial of the 15th-century Jewish exile.

This ancient Roman cistern has been the source of many legends throughout the centuries.

This public observatory is home to the "celestial cannon," the longest pointable telescope in the world.

Twelve towering statues once destined for Pécs Cathedral, now sheltering under arches.

This ex-prison dates back to the Middle Ages.

A collection of old neon signs from all over Poland line a secluded courtyard.

It’s a painted window that looks completely real, hiding on a building in the market square.

A mysterious concrete hand reaches out from between the stones of Uniwersytecki bridge.

The silly symbol for an underground protest group is now scattered around the city.

A striking public sculpture representing the period of martial law in Communist Poland.

In the center of Wrocław's old meat market stands a somber tribute to the city's livestock.