Museum dedicated to the terror regimes of Hungary.

A church of bones, decorated with 40,000 human skeletons.

Bronzes and busts that once stood in the city's main squares are now relegated to a small hidden courtyard.

A memorial to the atrocities of the People's Socialist Republic of Albania.

One of the best examples of a Byzantine period monument in Albania.

In this town's main square resides a statue of none other than the 43rd President of the United States.

Explore a traditional Albanian dwelling that pays tribute to the region's rich history.

In the heart of Tirana, this underground nuclear bunker has been transformed into a museum.

A museum dedicated to secret surveillance.

Once a safe haven for locals engaged in blood feuds, this 400-year-old fortified tower is now a museum showing what life was like for those lying in wait within its walls.

The largest Roman amphitheater in the Balkans once held over 20,000 people, but managed to lay hidden for hundreds of years.

According to a local legend, this old castle could only be built after a woman was immured in the walls.

Once the fallout shelter of a dictator, this sprawling bunker is now a combined history museum and contemporary art gallery.

What happens when you cross a mayor and a painter?

The elliptical citadel resisted the advance of the mighty Ottomans several times, thanks to the military prowess of the "Dragon of Albania."

Hundreds of thousands of concrete bunkers crowd Albania long after the fall of Communism.

An Albanian monument to the Communism that nearly crushed the country is now a crumbling wreck.

If you look closely at the oldest bridge in Paris, you might notice hundreds of ugly faces leering from its sides.

During the summer months, giant teddy bears take over Paris near Les Gobelins metro station.

One of Jeff Koons’s largest sculptures and his first commemorative work.

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

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

This bridge was constructed from the rubble of the infamous Bastille.

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