During the Second World War, Mussolini dug sixty-four bunkers in the foothills south of Bolzano. Bunkers and trenches are like wounds in the earth’s crust, places where many lives have met and, often, ended. But in these dark recesses of history, some creatures can find their refuge and life can flourish again. Follow Hanna Steigleder, from the Institute for Alpine Environment of Eurac Research, and Eva Ladurner, from the Museum of Nature South Tyrol, in an underground world made of silence and darkness, looking for its elusive inhabitants.