Lerna Heracles killed it, as the second of his labors. The strong Karstic springs remained; the lake, diminished to a silt lagoon by the 19th century, has vanished. Lerna is notable for several archaeological sites, including an Early Bronze Age structure known as House of the Tiles, dating to the Early Helladic period II (2500–2300 BC). The secret of the Lernaean spring was the gift of Poseidon when he lay with the "blameless" daughter of Danaus, Amymone. The geographer Strabo attests that the Lernaean waters were considered healing: Lake Lerna, the scene of the story of the Hydra, lies in Argeia
Greek ironclad Hydra broke out into the Aegean sea; the assumption was that the Greeks would dispatch "Georgios Averof" to hunt down "Hamidiye". Despite the threat to Greek lines of communication posed by the cruiser, the Greek commander refused to detach "Georgios Averof" from her position. "Georgios Averof" appeared approximately 12 miles from Lemnos; when the powerful Greek ship was spotted, the Ottomans turned to retreat with "Georgios Averof" in pursuit. She scored several hits on the fleeing Ottoman ships before breaking off the chase. "Hydra" and her sisters were too slow to keep up with "Georgios Averof", and played no part in