An eerie, derelict amusement park in Berlin.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

A relic of the old jail still stands in its original location.

In the Netherlands, one of the world's largest private car collections can be found.

The elegant manor house where Kaiser Wilhelm II lived in exile after World War I.

A dream-like maze full of strange art, surreal spaces, and fantasy landscapes to get lost in.

Rumored to have been frequented by Vincent van Gogh, it's the only remaining genever producer in the Hague.

This medieval castle was painted pink as part of a now-abandoned children's theme park.

The place where Czar Peter I of Russia resided in 1697 during his Grand Embassy.

An ancient Egyptian temple sits within a modern European museum.

A preserved building where the dead were once watched for signs of life.

This disused VLF radio station is no longer in service but the surrounding town still bears its name.

This miniature take on the Kremlin is one Dutch man's retirement project.

In the middle of one of South America's most historic walled cities lies a bar with an enormous collection of Soviet memorabilia.

An incredibly random collection of wax figures is displayed in a shopping center walkway.

Inside the world's largest seed bank, WWII botanists elected to starve to death rather than compromise their collection.

One of Ireland's most infamous prisons for rebels including men, women and children.

Peek through a transparent pyramid and drink in the mountain made of books.

An open-air sewer system that was covered piece-by-piece over 300 years.

"In the Dark" Restaurant in Paris offers dinner in complete darkness.

Colorful umbrella-covered trees in Singapore's Little India look straight out of Dr. Seuss.

A dilapidated psychiatric facility on the outskirts of Milan where electroconvulsive therapy was developed and Napoleon once lived.

Italian poet Dante Alighieri is entombed in this small mausoleum in Ravenna, and his hometown of Florence has never been too happy about it.

Renaissance villa and gardens complete with a tormented colossus.