The Ambroz Valley is a valley in the north of the Spanish province of Cáceres. It takes its name from the river that runs through it. Surrounded by mountains, the largest peak is Pinajarro. Silver Way through the valley since Roman times and made it a passage and an important communication route between the north and south of the Iberian Peniā¦The Ambroz Valley is a valley in the north of the Spanish province of Cáceres. It takes its name from the river that runs through it. Surrounded by mountains, the largest peak is Pinajarro. Silver Way through the valley since Roman times and made it a passage and an important communication route between the north and south of the Iberian Peninsula.