You don't need to be religious to appreciate the peaceful atmosphere of Cattedrale di Santa Maria Assunta. Ask when the next mass is scheduled or when you can go for a wander through.
Located in Acqui Terme, this principal church is worth a visit. But you'll find lots more to discover in the area. Nuove Terme Thermal Spa, La Bollente, and Basilica of St. Peter aren't too far away from Cattedrale di Santa Maria Assunta.