During World War II, Austria's oldest salt mine was used to store thousands of pieces of stolen artwork.

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

Physicist’s epitaph provides final confirmation to a career of turmoil.

This grand manse has been transformed into a museum devoted to one of the founders of Fantastic Realism.

The world's oldest known salt mine.

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

The Habsburgs' royal collections of art and wonders.

An Austrian house of bones filled with hundreds of intricately painted skulls.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

Baroque celebration of the end of the Great Plague of Vienna.

Op-art architecture designed for happiness.

Dine amidst exotic plants at this former royal greenhouse.

The former private quarters and office of Dr. Sigmund Freud now hosts a museum housing the works of the founding father of psychoanalysis.

The topiary maze at the Habsburg hunting lodge.

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

The final resting place for the remains of 143 Habsburg royalty.

The beautiful baroque library of the Hapsburg empire.

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

A floundering Polish shipyard was once the soul of the Solidarity movement that capsized communism.

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

A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.