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

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

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

In between two buildings in Ljubljana, medieval tunnel to nowhere.

Strange rumors surround the artist who created these solemn metal guard dogs.

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

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?

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

This ominous Albanian fortress houses tanks and downed planes as a reminder of their victories over Western imperialism.

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

A naturally beautiful, seemingly bottomless deep blue spring.

A beautiful mountaintop mausoleum devoted to a Montenegrin icon can't seem to make everyone happy.

Former military fort and site of untold horrors during WWII, this island may become the Adriatic's next luxury resort.

This exclusive resort has completely covered a tiny Balkan island in a 5-star warren of guest rooms.

A tiny church on a man-made island in the Adriatic.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

A curious little museum dedicated to the furry feline in the cat haven that is Old Town Kotor.

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

The site of Austria's biggest concentration camp now honors its victims.

This hanging crocodile is thought to be the "dragon" that once plagued a Czech city.

A peculiar clock commemorates a historic victory won by ringing the noonday bell an hour early.

A former top secret nuclear fallout shelter now operates like a hotel stuck in the Cold War.

A cheeky architectural easter egg.