Lierna is surrounded by some imposing peaks, which are reflected in its waters and render the landscape unique. The valleys surrounding Lake Como are some of the most beautiful areas in the Prealps, rich in vegetation and populated by numerous animal species. It is a homogeneous area from which many excursions start along old military roads and trails towards mountain pastures and refuges. The Grigna, Resegone and Legnone are important mountain ranges, but Monte di Lierna (Alpe di Lierna) become especially atmospheric and unforgettable during long summer sunsets and in the warm autumn light that encircles their contours, in winter whiteness and in the spring freshness. The mountains and valleys include the whole local area around the lake, with hills and mountain ranges that rise from the plain and enclose countryside and villages, reliefs and woods: Valsassina, Valvarrone, Valle San Martino and Val d’Esino, Val d’Intelvi, Val Menaggio. Lake Como’s mountain ranges offer endless opportunities for excursions and trekking
It is a 10th-century castle/fort, once used for the area's defense, with a fantastic view of the baia and the Lake Como.
Scenic view terrace