Archaeologists have pinpointed a Roman-era wreck off western Sicily, a find that could help clarify how commerce moved across the ancient Mediterranean. Here's what to know Reported by Divernet, the site sits about 3.1 miles (5 kilometers) from Mazara del Vallo at a depth of 151 feet (46 meters), according to the Carabinieri Cultural Heritage Protection Unit, or TPC. Authorities were notified after sonar identified the location and spear divers …