The houses of the workers of Carbognano were built around the Il Castello ( castle ) . In a way that it looks like they are weaved with each other, made of tufo , tuffstone . The village lies on the tuforock , wich is a soft stone . The ancestors made their cantinas in it . By hand they digged the caves complete with stairs . In these underground spaces, pitch-black depths refrigerators, the farmers held their precious wine quality well kept and apples, potatoes and chestnuts were preserved.