Lucrinus Lacus, or Lucrine Lake (Italian: Lago di Lucrino) 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. The road runs on an embankment, the construction of which was traditionally attributed to Heracles in Strabo's time. This strip was reinforced with a sea wall, "where the sea angrily dashes, but is thrust back with echoing roar" and severed by Marcus Vipsanius Agrippa, in order to make a harbour of Lake Lucrinus, which he joined to Avernus by a canal, as mentioned in Virgil, Georgics