An Albanian monument to the Communism that nearly crushed the country is now a crumbling wreck.

The fairy tale castle of the "fairy-tale king."

A small but immensely extravagant palace built by the "Night King."

Berlin's old airport.

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

Between Neo-Pagans and Neo-Nazis, these strange rock formations have a curious cult following and a very strange history.

This mysterious cross appeared on a farmer's lawn in 1972 and has been attracting pilgrims ever since.

An intricate and amazing house built by architect Karl Junker.

This "floating railway" is one of the world's oldest monorail systems.

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

This Nazi-built amphitheater was constructed on a sacred mountain site used by various German cults.

An eerie, derelict amusement park in Berlin.

A German apartment building hosting as many trees as human occupants.

A meteorite-bounded town in Bavaria.

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

Floating swimming pool within a moored vessel.

The world's tallest church tower reveals a spectacular view to anyone up to the task of climbing the daunting staircase.

Living trees form the structure of an open-air palace.

Twisted buildings adorn the banks of the Rhine river.

A tree-like building perches on its trunk in the Steglitz neighborhood of Berlin.

"The most colorful grottoes of the world.

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

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

An industrial relic is now one of Europe's most staggering art spaces.