Cairo Montenotte sits on the left bank of the Bormida di Spigno, on a plain ringed by hills that climb toward the Apennines in the direction of Monferrato. The town has been a crossroads since Roman times — it was a station on the Via Julia Augusta from Vado to Tortona — and was fought over by Lombards, Saracens, the Del Carretto marchesi, and the House of Savoy. Napoleon defeated the Austrians here in 1796, his first major victory of the Italian campaign; the Battle of Montenotte Memorial marks the site on the hills above town.
The old town retains traces of its fourteenth-century walls, including a tower and the Porta Soprana, a gate with a pointed arch. The ruins of the Del Carretto castle crown the hill above the gate, and the parish church of San Lorenzo, with its tall campanile, was built in the 1630s. The surrounding hills, part of the Parco dell’Adelasia, are good hunting ground for prized boletus mushrooms and black truffles.