Surface exploration and excavation probes have consented the identification, at the place now called La Costa, of a settlement referable to the transition period between the Latest Bronze Age and the first Iron Age. The ceramics found show forms and decorations characteristic of this period. Of particular interest is the discovery of a sandstone mould used for making knives, which proves the existence of metallurgy, connected to exploitation of the region's mineral resources. The descent of the settlement towards lower levels compared with the older village on Mount Lieto, seems due to the desire of controlling the paths along the valley as well as, more in general, those connected to the coastal area.
In the IIIrd-IInd century b.C. the place seems to have been newly occupied by a Ligurian settlement, probably devoted to agriculture and sheep breeding. Besides the locally produced ceramics, we also find fragments of black glazed cups, which prove that the community was part of commercial circuits in the upper Tyrrhenian.