 Part of Sassello's territory lies within the boundaries of the Parco naturale regionale del Beigua.Little is known of pre-historic and even medieval events before 1000 AD, although the area has certainly been visited - if not inhabited - by stone age humans, as evidenced by tools and weapons found locally.Livy reports the presence of the Statielli, a Ligurian tribe, not far from Sassello in present-day Acqui Terme.