 During the war, it was originally supposed to be used for the safe storage of the special trains of Adolf Hitler while he was in the nearby Adlerhorst.Due to the increasing air raids on Frankfurt around 1941, the VDM copper works at Heddernheim shifted parts of the war production here and used forced labourers, which is commemorated on a plaque near the south portal.Shortly after the end of the tunnel is the new halt of Hasselborn which was moved from the old station about 100 metres closer to the village in 1999.