The site of a concentration camp where inmates were made to take part in one of the largest counterfeiting operations in history is now hauntingly empty.

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.

The "Prussian Versailles" that is as glorious today as when it was built.

The last bastion of Roman presence north of the Alps looms over a German town.

Golden cobblestones remember a time when this small alley was used to avoid having to give a Nazi salute.

Cold war icon and onetime "hole" in the iron curtain.

The Beaux-Arts aquarium boasts a vast collection of saltwater and freshwater fish on an island in the Detroit River.

The bones of an old zoo crumbling in the shadow of a new one.

These enduring murals depicting a distinctly Marxist tribute to capitalism could not even be defeated by McCarthyism.

Three prestigious academic collections come together to create a world-class natural history museum.

Two thousand artifacts from around the world collected by one woman who loved to travel.

Statue commemorating the use of ether in anesthesia.

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

This "preacher's pulpit" once used for pagan ritual, is home to a new, and dangerous ritual.

Norway's oldest cathedral still in use.

A little sculpture with a large wardrobe.

Hear the quietest sound from across the dome.

The fairy tale castle of the “fairy-tale king,” this was also the inspiration for Disney’s “Sleeping Beauty.”

A castle from the Holy Roman Empire that hosts traveling youth... in its stables.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

The prototype for all Nazi concentration camps.

A miniature city, once ruled by the Queen of the Netherlands.

These pretty kitties killed and ate as many as 135 railway workers.

Impossibly life-like natural history models created out of glass by a father and son.