A castle from the Holy Roman Empire that hosts traveling youth... in its stables.

This lurid German fountain plots the sad course of marriage from dating to death.

Nestled on the banks of a river in Nuremberg is a small museum that was once home of the city's official executioner.

This abandoned coliseum was intended to be a grand Nazi rallying ground before it was halted at the end of the war.

Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.

A patriotic medieval knight in driven-nail armor raised money for widows and orphans of WWI.

A neo-Gothic church built to thank God for saving the Emperor of Austria from an assassination.

Giant WWII fortresses that fired 8,000 rounds a minute, now home to thousands of pigeons.

The Habsburgs' royal collections of art and wonders.

Op-art architecture designed for happiness.

This Austrian museum celebrates the work of famous forgers and their inimitable imitations.

Legends surround an ancient tree trunk riddled with nails for good luck.

The "stairway to heaven" lookout tower was built to resist weather, arson, and the laws of physics.

When you're a great Russian Tsar, even your vomit gets a statue.

Brussels' favorite peeing boy has a sister.

Cozy basement bar sports an inventory of over 2,000 beers.

An ancient knight and a symbol of the city's freedom.

This memorial to local World War II heroes is slowly being reclaimed by nature.

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

On top of a resort town as old as the Bronze Age sits an incredible war memorial statue overlooking the beaches below.

One of the world's oldest olive trees, thought to be over 2,000 years old.

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

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

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