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
Hydra the Revenge coaster comes from the story of Hercules in Greek Mythology. According to the story, Hercules had to perform twelve labours. After defeating the Nemean lion for the first labour, the second was to defeat the Hydra, a nine-headed creature with eight serpentine heads that would regrow each time they were cut off, including one that was immortal. Dorney Park altered the remainder of the story — after Hercules managed to defeat the Hydra initially, he buried the immortal head deep under a giant stone, with the intention of sealing it for all time. Many years later however, the head slowly