The Sanctuary of Nostra Signora di Montebruno stands in the village of Montebruno, one of the main settlements in the upper Trebbia Valley. The church was built in the late 15th century on the site of a Marian apparition and has been a pilgrimage destination ever since, drawing visitors from Genoa and the surrounding Ligurian coast. The interior is sober and dignified, with ex-votos accumulated over centuries lining the walls — small painted panels recording miracles attributed to the Madonna.
Near the sanctuary, a Roman bridge crosses the Trebbia River in a single arch, its stonework remarkably intact given its age. The bridge was part of the ancient route connecting Genoa to the Po Plain through the mountain passes, and the road surface shows the wear of medieval and earlier traffic. Montebruno also has a small folk museum documenting traditional mountain life in the Ligurian Apennines — tools, textiles, and agricultural implements that give context to the hardship and self-sufficiency of valley communities before the 20th century.