Schutzbauten Stuttgart: Pionierstollen Mühlhausen
Schutzbauten Stuttgart: Pionierstollen Mühlhausen lies near Mühlhausen town hall in northwestern Stuttgart. The former air-raid shelter runs through the shell limestone of the Neckar hills beneath the village. You see a manually dug and blasted tunnel rather than a natural cave. Its passages reach 1.8 metres wide and 2.2 metres high, creating a stark underground refuge.
British bombing destroyed much of Mühlhausen during the Second World War, prompting construction over roughly six months. Women and older men carried out much of the work while many younger men served in the war. Two excavation teams approached from opposite sides, then joined their passages into the PI 22 87 complex. The connected tunnel extends 802 metres, with its ceiling lying as deep as 23 metres below the hill. Several bends at the entrances reduced pressure from bomb blasts, while timber supported the limestone walls.
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