Jerzu is the capital of Cannonau. The Cantina Sociale produces over 3 million bottles a year from vines growing at 500 metres altitude on the limestone Tacchi. In August the Cannonau Festival is held — three days of tastings, music and dancing in the square.
Ask for the "Cannonau Riserva degli Anziani" — the label dedicated to the centenarians. You won't find it outside Sardinia.