The castle of Novi Ligure is located near the historic center of Novi Ligure and was for centuries the extreme northern border of the Republic of Genoa. It is part of the "Open Castles" circuit of Lower Piedmont. Only the tower and some sections of the surrounding walls remain of the castle, which today delimit part of the large park. It was crowned by a Ghibelline battlement which has been lost but is still perceptible, despite the current covering with a tile roof.