The closest parking area for visiting the Montagna Spaccata Sanctuary is right at the top of Via Santissima Trinità (in front of the entrance). It is a paid parking area (blue stripes). Be careful, however: This is a very small parking lot. During weekends, holidays, and in high season it fills up very quickly from the early morning hours. Enea’s tip: During these busy periods, I strongly advise against driving up, as you risk getting stuck in traffic along the rise without finding a spot. It is better to park downtown or in the Serapo area and walk up (it is a pleasant walk of about 15-20 minutes).