The soulless eyes of 82 bronze children stare on forever in remembrance of a horrifying World War II massacre.

This former quarry is now a picturesque gorge that hides a sunken lake.

Every summer, an open-air swimming pool appears at the base of a Finnish city's beloved winter attraction.

Soaring over 6,000 feet in the Bavarian Alps, this beer garden was once Hitler's 50th birthday present.

Home of controversial poet priest who penned the words for the Austrian national anthem used in the 1930s.

Each year melting snow turns these Austrian hiking trails into scuba zones.

The shell of a medieval fortress offers commanding views of the area it once protected.

Bizarrely-painted church designed by a controversial artist.

A centuries old castle atop a dormant volcano houses museums devoted to both women and witches.

The medieval "dragon" on an Austrian city's coat-of-arms comes to life in a fountain.

The world's most important buildings shrunk to a tiny size.

This spire on an Austrian mountain is wrapped around a long spiral slide and has the world's tallest wooden observation deck.

A tower marking the spot where Yugoslavia began its resistance against the invading Nazis stands neglected, but not quite forgotten.

This stunning, out-of-the-way Croatian monument commemorates a community's uprising against occupying fascist forces.

This scale model of our solar system hid in plain sight for years before a physics team sought out all the planets.

This former estate of a fascist leader is now a burnt out ruin leading to a system of secret tunnels.

Once a state-of-the-art tuberculosis treatment spa, these ruins are now ruled by paintball players.

The Slovenian architect designed many landmarks in the capital city, including his own dream house.

A relic from the Industrial Revolution got a second life as a contemporary performing arts space.

A cemetery for Slovenian notables also serves as a popular recreation space.

This abandoned Slovenian military barracks has become a punky-political art squat.

Colorful power station with a chimney equipped with a gallery for exhaust monitoring equipment.

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.