This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."

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

Oriental bazaar in the heart of Sarajevo.

This historic timepiece is thought to be the only public clock in the world that keeps lunar time.

A monument on the pavement marks the spot where two cultures that shaped Sarajevo come together.

A Bulgarian monument to Russia's role in World War II is constantly being painted in pop culture protest.

A striking symbol of the Bulgarian capital.

This scale model of our solar system hid in plain sight for years before a physics team sought out all the planets.

This no man's land slicing through the island is strewn with abandoned relics of another time.

An ornate plague column – built to celebrate life – claimed the lives of numerous artisans during its construction.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

During the Soviet era, the spire of this longstanding church was used as a radio transmission tower.

The largest lake in the Faroe Islands seems to be held hundreds of feet above sea level thanks to an optical illusion.

This remote island village was in danger of depopulating completely until a tunnel was built to connect it to the rest of the world .

Legend says this rock spire is the finger of a witch who wanted to throw the Faroe Islands towards Iceland.

The narrow passages will challenge even the bravest driver.

The world's largest reflecting pool is just two centimeters deep.

A cluster of historic bathhouses built on the famed hot springs that gave the Georgian capital its name.

With over 10,000 lights, this engineering marvel lights up the city after dark.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

Giant marble phalluses on the sacred island of antiquity.

A sharp sculpture made of thousands of pieces of jagged glass.