When you are in Albinia, leave the Aurelia state road and go towards Manciano. Reach Borgo Marsiliana, and after 3 km you will arrive at a tournabout. Turn left towards Guinzoni. Go straight on for 2 km, then turn right; after 2 km you will arrive!
Coordinates for the navigator: Degree of latitude: 42.55579 – Degree of longitude: 11.40312