Situated on a sacred Inca site, this 16th-century cathedral took nearly 100 years to build.

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

A miniature train-ride through Slovenia's largest cave system.

The Adriatic's most famous wind can be reliably experienced in the city's Marina.

For more than a century, Parisians have come for affordable dishes in a grand converted train station.

Longest fortress system anywhere in Europe.

A small museum built by a family that survived the Siege of Sarajevo.

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

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

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?

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

This lonely minaret with an unusual decorative symbol is all that remains of a historic Ottoman mosque.

The site of a legendary 14th-century battle and a controversial 20th-century speech.

This massive monument was unveiled the day Kosovo declared independence from Serbia.

A futuristic, brutalist masterpiece that is also strangely prison-like.

A 11-foot former president stands on a Kosovo street that also bears his name.

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

One of Serbia's oldest luxury hotels and a nostalgic echo to Yugoslavia in the state's former capital.

A towering spire in the fortress of Kalemegdan honors the victorious armies of Serbia during their struggles against the Ottoman Empire.

A museum dedicated to the former country.

Destroyed Serbian army headquarters sits half crumbled in a largely revitalized Belgrade.

Structure built from the skulls of vanquished foes.

In the hometown of the Catholic saint and Nobel Peace Prize winner, a memorial dedicated to her legacy.