In Torri del Benaco, a few kilometres from Costermano, stands the Castle of the Scaglieri family. Its origins are thought to date back to Roman times, because of the design of the
west tower; different from the other two towers, this was built by a Roman legion who established a castrum here in the first century BC. BC.
The otherparts of the castle, however, were built in the early 10th century AD at the behest of Berengar I, king of Italy, who ordered the restoration of the castle walls to defend the town from the marauding Hungarians. Remains of the walls can still be seen between the Garda road and the old town centre.