The archaeological excavations of underground Perugia, in the heart of the structure of the island of San Lorenzo, give the sense of a discovery through the centuries. Little known even to the residents themselves, these places allow you to enter the bowels of the hill that houses the city of Perugia. It is possible to really understand how from the Etruscans, passing through the Romans and the papal settlement, the city center has assumed its current shape. The descent from the cloister of the cathedral down to the excavations it is comparable to using a time machinewhich realigns its hands with our watch as we go back through the centuries towards the surface.