Since 1874, this macabre collection has developed into a museum devoted to Scotland Yard's mementos of dastardly deeds.

This German "living museum" is maybe a bit too immersive.

From morgue to urn, watch the whole process at this unusual educational attraction.

This East German military command bunker was ready for World War III.

A unique Holocaust memorial tells the personal stories of the Jewish residents exiled from greater Berlin.

Retirement home for giant obsolete machines.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

Super-heavy Nazi architectural experiment.

Slaughterhouse Five opens its dank doors to fans of Kurt Vonnegut.

An old department store turned Nazi prison turned artist commune.

The 1936 Summer Olympics site is a crumbling remnant of sportsmanship and a history its host country would like to forget.

Terrifying derelict military hospital once housed a recuperating Hitler.

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

A surreal museum of extraordinary industrial objects.

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

An eerie, derelict amusement park in Berlin.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

An abandoned Nazi explosives plant founded by the inventor of dynamite is now an underground museum.

A fairytale Gothic castle steeped in Nazi treasure conspiracy theories.

This Nazi ruin was the site where Hitler was almost blown up by a suitcase bomb.

Descend into the tunnels to experience the life of a coal miner.

A Cold War command center is hidden under an idyllic countryside.

This sprawling Belgian fort was once thought of as impenetrable but now it is simply an abandoned relic.

This Belgian theme park began as a refuge for bored church children and was closed down when a boy lost an arm.