The flourishing valley formed by the Prino stream has one of its most fascinating centers in Dolcedo, a large commune at the bottom of the valley, with its characteristic aggregated buildings along the banks of the stream and its peculiar Grande bridge built by the Knights of Malta in 1292. Plunged in olive groves, rich of oil-crushers and mills, the town is divided in two parts, one around the parish church of San Tommaso and the other along the stream Prino, crossed by as many as five bridges. From the parvis of the church of San Tommaso there is a path that leads to the sanctuary of Acquasanta di Lecchiore, winding through olive groves and vineyards and touching ancient abandoned villages.
The comune of Dolcedo includes also Isolalunga, Costa Carnara, Bellissimi and Lecchiore. The boroughs of Dolcedo appeared in the early Middle Ages, populated by refugees from the Ligurian coast. Later it was a fief of the Clavesana family. In the 12th century cultivation of olive became a mainstay of the area. In 1228 the Clavesana ceded their lands to the commune of Genoa.