Lernaean Hydra Lernaean Hydra The Lernaean Hydra or Hydra of Lerna (, "Lernaîa Hýdra"), more often known simply as the Hydra, is a serpentine water monster in Greek and Roman mythology. Its lair was the lake of Lerna in the Argolid, which was also the site of the myth of the Danaïdes. Lerna was reputed to be an entrance to the Underworld, and archaeology has established it as a sacred site older than Mycenaean Argos. In the canonical Hydra myth, the monster is killed by Heracles (Hercules) as the second of his Twelve Labors. According to Hesiod, the Hydra was the offspring
Battle of the Lerna Mills Phillips places the number at 250). Prince Demetrios Ypsilantis and several philhellenes volunteered in the defense of the garrison. Protecting Lerna was vital since the mills contained large quantities of grain that supplied food to Nafplion. The mills of Lerna were surrounded by a stone wall that was flanked by a deep pond and a marsh. Moreover, the garrison was supported by two gunboats that were anchored a short distance (or "musket-shot distance") from the shore. Unfortunately, the Greeks did not repair a small break in the stone wall. As a result, a small contingent of Arabs exploited this weakness