A statue honors the children who fought Nazis in Poland.

This hidden collection of everyday objects illustrates life within communist Poland.

An artificial date palm stands as a memorial to Warsaw's Jewish community.

Special benches that play Chopin's music are scattered throughout his native city.

This biographical museum honors the groundbreaking scientist at her birthplace in Warsaw.

Hundreds of notes give thanks to the patron saint of lost causes.

After the famous composer died in Paris, his sister snuck his heart out of the country to honor his wish that it be buried in their native country.

The giant statue and its model solar system honor the native Pole who declared that the Earth revolves around the Sun.

At just 25 inches at its narrowest point, it's one of the tightest streets in the world.

A star-shaped fortress town fort built in the geometric model of the Renaissance utopian city.

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

The "dragon babies" of southeastern Europe.

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

This one-time health resort was used by aristocrats around the world.

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

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.

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

A whimsical bridge adorned with decorative dragons.

During World War II, this rice mill became a Nazi concentration camp.

This Roman monument is surrounded by more recent construction, offering a stark contrast between ancient architecture and the modern urban landscape.

Two stone columns flank the grand Venice square, but there were supposed to be three.

In the past, Renaissance sex workers were encouraged to entice customers on this bridge.

According to tradition this is the oldest church in Venice, but its actual age is a mystery.