 At the end of the 13th century, since the local political scenario had been changed, a Pisan garrison settled in the castle, as witnessed by pieces of weapons and armours dug up in the area.The park covers 450 hectares in the north of Campiglia Marittima and it shows history of mining and metallurgical cycle from the Etruscan era to the present day.The remains of Rocca San Silvestro, a fortified borough built by the della Gherardesca family in the 10th-11th centuries, represent the heart of the park.