These fascinating tours of a working oil mill near Baeza will teach you all you could want to know about the process of turning olives into oil, how the best oil is made and what distinguishes extra virgin from the rest. At the end you get to taste a few varieties, and you'll probably emerge laden with a bottle or two of San Francisco's high-quality product.
Tours can be given in English or French (ring ahead to ensure availability). To get there, turn off the A316 about 4km west of Baeza at Km 14, signposted to Begíjar, and turn right immediately past the petrol station after 1.4km.