Among the several castles situated in the Park's territory, there are the fortresses of Vigevano, Pavia, Somma Lombardo, Bereguardo tower; of others only a few rests remain: it is the case of Ozzero, Besate or Vergiate; some of them have been so rearranged during the centuries that they are almost unrecognizable: Garlasco, Arsago Seprio and Bernate Ticino.