The First World War left indelible and clearly still visible traces on the territory of the Dolomite area, such as the remains of trenches, military emplacements, some of which are now restored for tourism purposes, together with kilometres of tunnels that cross the mountains. A historical heritage of enormous importance, as witnessed by Franco Gaspari, mountain guide and history enthusiast, and Curti Covi, young historian and curator of the Bunker Museum in Dobbiaco.