Truffle and Baume Saint Antoine. Visit our truffle farm 5 minutes from Romans sur Isère. With passion, the rabassier will explain the secrets of culture and the vagaries of the harvest. The Drôme des Collines is a favorite terroir for the Black Truffle "Tuber Mélanosporum". With family or friends, discover the Diamond of French Gastronomy - (in groups of 10 people minimum). During the harvest season truffles (November to March), we can - You propose a truffled meal with a confrère restaurateur in love with the truffle of the Drôme des Collines.