In the center of Wrocław's old meat market stands a somber tribute to the city's livestock.

A collection of old neon signs from all over Poland line a secluded courtyard.

A 90-ton, gravity-defiant steam locomotive shoots for the skies in this bizarrely beautiful public artwork.

Poland's oldest salt mine has nearly everything one needs to live underground forever.

This sprawling concrete suburb of Kraków was designed by the Soviet Union as the model proletarian city.

This modern French ossuary contains the jumbled bones of 130,000 WWI soldiers.

Site of one of World War I's most horrific scenes.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

Bursting forth from a historic German neighborhood, these day-glo palaces are now a bright fixture in the town.

A collection of abandoned typographic signs from Berlin and beyond.

The world's first clock to use set theory as a measure of time required the invention of a new light bulb just to maintain its obtuse measurements.

These brass bunnies honor the rabbits that dominated the no-man's-land around the Berlin Wall.

Super-heavy Nazi architectural experiment.

An eerie, derelict amusement park in Berlin.

A brush maker used his factory to protect blind Jews from the Gestapo.

A unique Holocaust memorial tells the personal stories of the Jewish residents exiled from greater Berlin.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

A towering monument to war, located on a beautifully peaceful hill.

A memorial to the beloved brown bear that served in the Polish army during World War II.

This unique railroad museum secretly contains the history of Poland rebuilding itself from the inside-out.

This symbol of Polish heritage survived the occupation during World War II, hidden in plain sight.

Memorial to the lost dead of Gdansk, whose resting places were destroyed during World War II.

This 700-year-old structure is one of the most unique architectural and historic monuments in Gdańsk.

A World War II torpedo launch station abandoned off the Polish coast.