Check in / Check out c / o First Italy Service - Via del Tirreno, 19 - Principina a Mare (Gr) From Northern Italy: Highway; up to Firenze Certosa, take the highway (SS 223) for Siena and continue for Grosseto. Exit at Grosseto-Sud and follow the signs for Principina a Mare (SP La Trappola). Enter Principina a Mare and follow the main avenue for about 1.5 km. On the left, in the commercial area, you will find the Prima Italia Service. From South Italy: SS Aurelia up to Grosseto (Grosseto-sud exit). Follow the directions for Principina a Mare (SP La Trappola). Enter Principina a Mare and follow the main avenue for about 1.5 km. On the left, in the commercial area, you will find Prima Italia Service Immobiliare.