Monte Bernorio

The Monte Bernorio is an elevation located next to the town of Villarén de Valdivia, in the north of the province of Palencia where important archaeological remains have been found, as well as the remains of a fortified Cantabrian city, which exceeds 120 ha and is one of the largest found in Spain and also in Europe. This oppidum is one of the most important archaeological sites from the pre-Roman period in the Iberian Peninsula, also known as Castro de Monte Bernorio.

Source: Wikipedia