Along state route 95 in western Idaho. September 27, 2006.

This division is one which has long been recognized by the inhabitants of the Neapolitan provinces, who speak of the second flat region of fertile plains as the Campagna Felice, and of the first as the Campi Flegræi.

The Campi Phlegræi, or “Burning Fields,” then, owe their character to the fact that within their confines the topographical features are chiefly the result of the assemblage of a number of craters of volcanic disturbance grouped in close proximity to one another. This region of volcanic vents extends over about 50 square miles, the greater part of which lie within a rectangle measuring 12 miles from east to west, 5½ from north to south. On the south the land runs out into two promontories, which limit the east and west seides of the bay of Pozzuoli. On the east is the Posilipo ridge, terminating in the island of Nisida; on the west is the Baia-Miseno promontory, extending out towards the islands of Procida Ischia.

Excerpted from ‘The Phlegræan Fields Section I.—The Volcanoes’, by R.T. Gunther. Appearing in The Geographical Journal, Including the Proceedings of the Royal Geographic Society, volume X, published by The Royal Geographical Society through William Clowes and Sons, London, 1897.