Step inside this haunting WWII bomb shelter, hidden beneath a Berlin subway station

Berlin was a nerve centre for the Nazi movement during WWII. The city became a top target for allied forces looking to weaken the Third Reich's defences.

Much of the city was obliterated by bombings and attacks, forcing Berliners to take shelter far beneath the streets of the German city.

One of the last remaining civilian air raid shelters is open for the public to explore after having been restored and cared for by Berliner Unterwelten, an organisation dedicated to preserving Berlin's underground history.