The Phlegraean Fields, from Greek φλέγω phlego, "to burn", is a large volcano situated to the west of Naples.
The area of the caldera consists of 24 craters and volcanic edifices, most of which lie under water. The caldera, which now is essentially at ground level, is accessible on foot. It contains many fumaroles, from which steam can be seen issuing, and over 150 pools of boiling mud. Several subsidiary cones and tuff craters lie within the caldera. One of these craters is filled by Lake Avernus.
Italian wine, both red and white, under the Campi Flegrei DOC appellation comes from this area which comprises the Naples districts of Agnano and Fuorigrotta, the area of Pozzuoli, Bacoli, Monte di Procida, Quarto, the Phlegrean Islands (Ischia, Procida and Vivara).
Rich in phosphorus, magnesium and potassium, the volcanic soils are ideal for the production of excellent wines. Sandy, with very
fine and particularly permeable ashes: the ideal conditions for obtaining high quality grapes, which are born in most cases from
ungrafted vines, longer-lived, robust and resistant to drought, as well as limestone and saline.
The resulted wines are all characterized by great minerality and acidity