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

The prototype for all Nazi concentration camps.

A beautiful lighthouse with as many steps as days in the year, as many windows as weeks, and as many levels as months.

A unique museum tells the story of the day-to-day life of World War I soldiers.

A preserved Nazi labor camp now has a Holocaust museum on site and memorials to the thousands that died while imprisoned at the camp.

From Nazi chemicals to the CIA, this architectural marvel has played a fascinating role in German history.

The scars of World War II are preserved on its walls.

This monolithic slab of art metal crowns a German slag heap.

When the rain falls, this drain system turns into a musical instrument.

A whimsical art tower at a Bavarian brewery includes a grotto for its mythical beer-brewing dwarves.

This giant glowing "beanpole" adds much-needed pops of color to an otherwise drab power plant.

This obscene artwork on the side of a newspaper office pokes fun at a rival paper's former editor-in-chief.

Ruins of a German Castle on top of a towering stone pillar.

A section of destroyed vertical lift bridge stands alone in the Peene river.

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.

A simple tribute to the microscopic arachnid that gives its juices and its life to help make a speciality German cheese.

This natural hill rose another 130 feet from the debris and rubble added after World War II.

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

Europe's largest natural bridge has a 19th century royal chateau built into its side.

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

The smallest port in France is named after the pirate who created it.

This Communist-era residential block is one of the longest residential building in Europe.

The silly symbol for an underground protest group is now scattered around the city.

Relive a Polish uprising via an enormous, century-old cyclorama.