Lerna (LUR-nuh). Village where the "Spring of the Hydra" is still pointed out today. Mythologically it was in the swamps of Lerna that Heracles, as one of his Labors, killed the many-headed Hydra. The bottomless Alcyonian Lake, through which the god Dionysus gained access to the Underworld to rescue his mother from the dead, was also in the vicinity of Lerna.