Not far from Novi Ligure is the town Gavi. It is known for white wine and the widely visible Castel, which dominates the landscape in a strategic position. A defense castle was probably already on the mountain in Roman times. The Castello di Gavi has been occupied since the 10th century. The current design was created by Friedrich Barbarossa and later reinforced by the Visconti in the 14th and 15th centuries. The Gavi Castle with the museum can be visited at the weekend.
And yes, the Gavi wine is excellent. A standard to be found in every Italian restaurant around the world. Try it on site.