Lucrinus Lacus, or Lucrine Lake (Italian: Lago di Lucrino; Neapolitan: Laco 'e Lucrine) is a lake of Campania, southern Italy, less than one kilometre to the south of Lake Avernus.The lake is separated from the sea (the Gulf of Pozzuoli) by a narrow strip of land that is traversed by the coast road, the Via Herculanea, and by a modern railway.