The bay of Saturo, due to its relatively sheltered and inland position compared to the whole coastline, is a good natural landing place. To defend the landing place from the action of the sea, a breakwater was built with loose rocks. Now completely submerged, the barrier formed an arch between the base of the promontory and the sea. The structure is approximately one hundred meters long, with a trapezoidal section, approximately 17.5 meters wide along its path and from 1 meter to 3.5 meter high at the end. Comparisons with similar structures allow for dating back the breakwater to the Roman Republican age (II – I centuries B.C.).  Near this structure, there is a highly concretioned submerged block, 8 meters long, 6 meters wide, made of curved and flat large tiles (embrici) stacked, placed side by side or overlapping each other. It is evidently the cargo of a ship carrying building materials: when the ship sank, the cargo remained almost intact, with the tiles arranged just as they had been stowed. A number of fragments of amphorae were also found, which allow for dating back the wreck between the II and I centuries B.C. In the north-western area of the bay of Saturo, two wrecks dating back to the II century B.C. have also been identified. One was transporting building materials and the other carried a load of Italic amphorae.