08/09/2026
Originally excavated during the First World War and subsequently expanded into a deep public air-raid shelter for World War II, this facility was engineered to accommodate up to 1,350 citizens. The modernized subterranean shelter featured hot and cold running water, flush toilets, and a central canteen that grew into a vital social hub for the local community. Beyond its civilian protection role, the complex served as a testing ground for experimental rotary tunneling equipment likely Whittaker machinery originally developed to cut trenches on the Western Front.