The first (but not only) upside-down house in Germany.

Shimmering sea-colored mosaics and Jesus statues cover this opulent building.

Reminders of the Battle of Berlin still scar the railway.

A university observatory dome painted to resemble the beloved 'Star Wars' droid.

Made from trees and then abandoned, this fence is still growing along a path in Germany.

The prison where Hitler wrote "Mein Kampf," and 278 Nazis were later executed for war crimes.

An amusement park on the grounds of an unused nuclear power plant, with a swing ride inside the cooling tower.

This curious sculpture represents the perseverance needed to take to the skies.

The abandoned mine where American troops discovered a treasure trove of art and artifacts hidden by the Nazis.

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

A small man-controlled waterfall powers an Art Nouveau elevator and is accessed via narrow gauge, solar-powered tramway.

The many—66 to be exact—faces of the German forest.

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

Crop circles inspired this whimsical garden in Germany.

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

A tiny chapel clings to a precipice above Germany’s gemstone capital.

Solar observatory doubles as a daring display of Expressionist architecture, much to Einstein's chagrin.

A stunning two-story timepiece within a medieval Brick Gothic church.

The largest brick bridge in the world.

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

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

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

Twisted buildings adorn the banks of the Rhine river.

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