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

Twisted buildings adorn the banks of the Rhine river.

Germany's Glienicke Bridge has a shady history of clandestine meetings, espionage, and spycraft.

Hamburgers are intensely proud of their tunnel beneath the river.

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

Model Trains and Much More in Hamburg.

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 largest treasure hoard in Europe is contained in a castle that was bombed out during World War II.

One of downtown Berlin's last reminders of its Communist past.

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

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

A Black Forest cuckoo clock theme park features one timepiece big enough to walk inside.

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

Among the ostentatious rococo ornamentation of this church, an image of death cuts the life-thread.

The prototype for all Nazi concentration camps.

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

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

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

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

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

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

Week-long block party becomes a competition for the best decorated street.