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

Reminders of the Battle of Berlin still scar the railway.

Hitler's bleak vision of relaxation still stands as a mostly abandoned 10,000-room resort complex.

A collection of artworks exclusively created by the mentally ill that was almost burned by Nazi culture police.

Twisted buildings adorn the banks of the Rhine river.

The largest brick bridge in the world.

A Nazi concentration camp and Anne Frank's place of death.

Enter the cabin of a life-sized Hindenburg replica.

This incredible stone temple is a monument to death, victory, and fantasy architecture.

Retirement home for giant obsolete machines.

Go surfing on this urban wave, "hacked" by local surfers.

The architect of this fanciful complex called it an "oasis for humanity and nature in a sea of rational houses."

The entrance to this Frankfurt subway station looks like an old tram car crashed into the concrete sidewalk.

Bursting forth from a historic German neighborhood, these day-glo palaces are now a bright fixture in the town.

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

This painted Lego bridge is the product of over a century of locomotive history.

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 enchanting mountain plateau celebrates spooky local folklore.

A former ironworks that was the first UNESCO industrial site.

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

Hamburgers are intensely proud of their tunnel beneath the river.

One of the most easily accessible examples of the rare 1960s UFO houses.

A strange rock formation with numerous legends trying to explain it.

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