The B-Werk in Besseringen is a panzerwerk, a defence system, which was built between 1938 and 1940 by Hitler.
the Celtic ring wall encircles the Dollberg, a hill about 695 metres above sea level near the town of Otzenhausen.
this superterranean eight-storey air raid shelter was built in 1938 and measures 23 metres in height. During World War II, it could provide shelter from air raids to approx. 200 people at a time.