The world's biggest pet store.

An old slaughterhouse now holds the largest collection of pig artifacts.

The birthplace of Karl Marx is now a museum dedicated to the communist revolutionary's life and work.

The largest bell in the world has been swinging high above a Cologne cathedral for almost a century.

The largest brick bridge in the world.

This riverside restaurant has been serving customers since 1146.

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

This lurid German fountain plots the sad course of marriage from dating to death.

These former Nazi anti-aircraft towers offer a singular view of the north of Berlin in the summer, and a sanctuary for bats in winter.

A fearsome dragon clings to a corner of Munich's city hall.

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

This abandoned coliseum was intended to be a grand Nazi rallying ground before it was halted at the end of the war.

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

The oldest Jewish cemetery in Europe survived Hitler's Germany.

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

This 600-year-old home seems to defy physics.

The footprint of a frustrated devil in Munich's Cathedral.

Once the tallest building in the world, this abandoned church is now a monument to the destruction of WWII.

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

These bronze pamphlets remember a remarkable group of Germans who fearlessly opposed the Nazis in the very center of their power.

No need to strap in for a "ride" on this walkable roller coaster.

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

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

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