This once-derelict building is now one of the most beautiful bookstores in the world.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

At less than four inches in height, this iconic fictional character is the smallest public statue in all of Moldova.

Arguably Belgrade's only example of pure Art Deco architecture.

A museum dedicated to the former country.

A number of craters left by fatal mortar strikes have been filled with red resin to remember those lost during the Siege of Sarajevo.

The place where World War I began.

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

This ironic war memorial thumbs its nose at a campaign of inedible humanitarian aid food products.

Martin Bricelj Baraga's monolithic sculpture measures the blueness of the sky, and changes color to match it.

A public work of art that also provides some relief from the summer heat.

A trough of 700 strange bronze faces runs through a narrow alley in Ljubljana's old town.

This sculpture honors the man who was known as the "Righteous Among the Nations."

Where the lovelorn find a home for their sentimental keepsakes.

A meow-velous tribute to a beloved street cat, made famous on the internet.

Unable to build support structures on glaciers, the engineers for this tramway were forced to design a unique system.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

This courtly monument celebrates an influential comedian who turned taking the piss out of the powers-that-be into an art.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

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

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

Someone loved this song enough to carve all of its lyrics onto a tree trunk in a Berlin park.