Mount Piambello is situated in the heart of the park area, south of the small town of Marzio. This mountain is composed of volcanic rocks and, standing 1159 meters above sea level, dominates the Valceresio, Valganna and Valmarchirolo. From its summit there is a view of the Italian and Swiss Alps, up to the Monte Viso. It is characterized by an extremely varied landscape, in which wide valleys shaped by glaciers alternate with soft pre-alpine hills and numerous waterways. This mountain is of geological interest due to the Peculiarity of Sass di Bol (m.a.s.l. 982 ), a large Monolith in red Porphyry (geology). Steps carved in this huge boulder provide visitors access to reach the panoramic top.
