 The large variation in elevation in the Sierras make them suitable for high-altitude wine experimentation, similar to what producers have done in Mendoza.The Province of Entre Ríos has a warm, humid climate similar to neighboring Uruguay, where tannat wines are produced.Until the 1930s there were over 60 wineries in the Province, producing more wine than Mendoza and San Juan; these were however forbidden by law in an effort to ensure the settlement of Western Argentina.