The Phlegraen Fields
The Fields, also known as Campi Flegrei (Greek for ‘happy land’), is a large 13 kilometres (8.1 mi) wide caldera situated to the west of Naples. It is a low lying volcano completely surrounded by populated areas in the town of Pozzuoli. Houses are built right to the crater rim. Campi Flegrei is active caldera, with periods of unrest in 1969-1972 and 1982-1984. Current activity at the volcano consists of solfataras in the crater. The caldera and its surroundings are inhabited by more than 1.5 million people.