The ruins of the Del Carretto castle occupy the highest point of the old town, giving a clear view across the Bormida valley toward the Ligurian Apennines. What remains are sections of wall, a crumbling tower, and the outline of the original keep, all overgrown with Mediterranean scrub.
The climb from the Porta Soprana takes about ten minutes on a steep cobbled path. It is worth it for the view alone. On a clear day you can see the hills of Monferrato to the north and, on exceptionally clear winter days, the faint glint of the Ligurian Sea to the south.