The Phlegraean Fields, also known as Campi Flegrei, (from Greek φλέγος, burning), is a large 13 kilometres (8.1 mi) wide caldera situated to the west of Naples, Italy. It was declared a regional park in 2003. Lying mostly underwater, the area comprises 24 craters and volcanic edifices. Hydrothermal activity can be observed at Lucrino, Agnano and the town of Pozzuoli. There are also effusive gaseous manifestations in the Solfatara crater, which is known as the mythological home of the Roman god of fire, Vulcan. The area also features bradyseismic phenomena, which are most evident at the Macellum of Pozzuoli which in the 18th century was misidentified as a Temple of Serapis, as geologists puzzled over bands of boreholes (Gastrochaenolites) left by marine Lithophaga molluscs on three standing marble columns, showing that the level of the site in relation to sea level had varied. This area is monitored by the Vesuvius Observatory.
Read more about Phlegraean Fields: Geological Phases, Wine, Cultural Importance
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“The landscape was clothed in a mild and quiet light, in which the woods and fences checkered and partitioned it with new regularity, and rough and uneven fields stretched away with lawn-like smoothness to the horizon, and the clouds, finely distinct and picturesque, seemed a fit drapery to hang over fairyland. The world seemed decked for some holiday or prouder pageantry ... like a green lane into a country maze, at the season when fruit-trees are in blossom.”
—Henry David Thoreau (1817–1862)