A state-of-the-art medical facility from the Imperial era is now a derelict ruin.

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

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

This World War II bunker now survives as a documentation of the Nazi regime and war crimes.

Tiny memorials honor individual victims of the Holocaust.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

Beneath the impressive baroque cathedral that rises from the center of Berlin lies the largest collection of Prussian royals in the world.

An eerie, derelict amusement park in Berlin.