The reinforced concrete cones used to stand at all camp boundaries. Apart from a few, the bunkers have disappeared from today's Salzgitter area.

The splinter protection cell tells the story of Camp 21, a labor education camp that was used to deter and discipline the workforce. Camp 21 was established in 1940 and was known and feared by the people of Salzgitter and far beyond.

There were many reasons for the imprisonment. Among them were "work-related laziness", forbidden contacts between Germans and forced laborers or criticism of the government system. Refusing to give the Hitler salute was enough, explains historian Maike Weth.

Men and women were imprisoned in Camp 21. It is estimated that between 26,000 and 28,000 men and around 7,000 to 12,000 women were held prisoner.

More than 900 deaths can be attributed to Camp 21 near Salzgitter-Hallendorf. Until the summer of 1943, most of them were buried in the Westerholz cemetery, then in the Jammertal cemetery.

If you would like to visit the mysterious places in Salzgitter yourself, you can access an online map where all the secrets can be found. The previously published films can also be accessed there.