The Vía de La Plata (Silver Way) or Ruta de la Plata (Silver Route) is an ancient commercial and pilgrimage path that crosses the west of Spain from north to south, connecting Mérida to Astorga. An extended form begins further south in Seville and reaches north to the Bay of Biscay at Gijón. The path is used by the modern A-66 and AP-66 freeways, as well as by the older N-630 national road.
The term Vía de la Plata is commonly thought to use from the modern Spanish word for silver, plata. The name actually derives from the Arabic word al-balat, which means cobbled paving and described the road as engineered by the Romans.
The historical origins of this route are uncertain. It is believed, based on diverse archaeological findings, that the route was used for commercial purposes involving tin. Tin was present in many regions of the Iberian Peninsula including Tartessos.
The "Tin Way" was used as an access road, which allowed the Romans to conquer tribes such as the Callaici, the Astures, and the Vacceos. Many sources, among them the Antonine Itinerary, describe the route to leave from Emerita Augusta, (present-day Mérida), capital of Lusitania, towards Asturica Augusta (present-day Astorga) through Tarraconensis.