Lake Avernus

Lake Avernus (or Lago d'Averno in Italian) is a volcanic crater lake located in the Avernus crater in the Campania region of southern Italy, around northwest of Pozzuoli. It is near the volcanic field known as the Campi Flegrei and comprises part of the wider Campanian volcanic arc. The lake is roughly circular, measuring in circumference and 60 m (213 ft) deep.