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

The most visited, and possibly most controversial, museum in Germany.

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

Tiny memorials honor individual victims of the Holocaust.

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

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

After a nearly successful attempt on Hitler's life, the conspirators met their fate in the courtyard of this Berlin building.

Berlin's old airport.

An abandoned NSA listening post on Berlin's "Devil's Mountain."

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

This massive steel pyramid can be entered by a set of jagged steps that let visitors stand in its heart.

The Bauhaus-style former industrial complex is considered the world's most beautiful coal mine.

This futuristic German television spire is actually the world's largest digital clock.

This mine is home to the largest man-made hole in Europe.

This fountain of a little boy that spits on passersby at erratic intervals is a town icon.

The castle where Martin Luther secretly translated the New Testament from Greek to German while in hiding.

This historic stone bridge has an entire neighborhood clinging to its sides.

Beloved children's TV characters freckle the German city's streets.

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

The fairy tale castle of the "fairy-tale king."

The largest mosque in Germany.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

Thousands of flowers create enchanting pink tunnels over the city streets.

A ruined castle stands atop a hill surrounded by dragon lore.