From Nice airport you need to drive towards Genova Italy (Gênes in French) on the motorway. After around 25 minutes you arrrive in Italy. You need to exit the motorway at Ventimiglia, just after the border and follow the directions Ventimiglia for almost 2 km. Once you reach Ventimiglia you follow the directions for Sanremo. After crossing a bridge over the railway there is a round about with the directions for Pigna. After turning left at this round about a 20 minutes drive will take you to Pigna. There are also direct trains to Ventimiglia from Milan, Genoa, Turin, Rome, Nice and Marseilles. There are buses leaving from via Cavour 100 meters from the Ventimiglia station for Pigna 4-5 times per day except Sunday.