A striking 12th-century-style castle built on the edge of a cliff.

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

The music is over at the Ballhaus Riviera Ballroom, but the ballroom remains in haunting disrepair.

A state-of-the-art medical facility from the Imperial era is now a derelict ruin.

A sprawling Baroque park with 300-year-old hydro-pneumatic waterworks.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

This noble mash-up in eastern Luxembourg is part Medieval, part Renaissance, all castle.

The abandoned mine where American troops discovered a treasure trove of art and artifacts hidden by the Nazis.

The 1936 Summer Olympics site is a crumbling remnant of sportsmanship and a history its host country would like to forget.

A simple tribute to the microscopic arachnid that gives its juices and its life to help make a speciality German cheese.

Tiny castle in the middle of the Rhine made you pay to pass.

Wax models of disease and deformity are on display at this German medical museum.

Model Trains and Much More in Hamburg.

Remnants of an exploded schooner and wrecked submarines form a breakwater.

The first recognized Neanderthal remains were found in this now-lost cave in 1856.

Joe Cocker's 1988 concert at this site in East Germany marked a changing sea tide that would eventually lead to reunification.

In addition to fine dairy products, the world's most beautiful milk shop also offers a feast for the eyes.

Extensive Orthodox icon collection in Andorra.

A museum of tiny buildings in the tiny country of Andorra.

Some of the smallest works of art in existence.

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

The beautiful, ornate weather station is the most popular geocache in Salzburg.

The world's largest historic armory was established by independent citizens to defend themselves from the wars of larger forces.

Mozart's skull may be held in this collection, but definitive proof continues to elude scientists.