The Castello di Roccavignale stands on a hill above the village, a trapezoidal walled enclosure with four square towers at its corners. It was built by the Del Carretto marchesi in the 12th or 13th century, passed to the marchesi of Monferrato in the 14th, and was finally absorbed into the Kingdom of Savoy in 1714 as an imperial fief.
The fortifications saw action twice in the 18th century: in the 1744 War of the Austrian Succession and again in 1796, when Napoleon's troops burned the village at the foot of the castle. The site is in ruins today but the surviving walls and towers are substantial enough to give a clear sense of its original form. The walk up from the village takes around 20 minutes and the views over the upper Bormida valley are good.