Waters of Stynx: One of the most famous myths of Achaea is associated with Chelmos and the Waters of Styx. It was said that the waters of the source were derived from the river that flowed in the Underworld. In these waters, Thetis dipped her son Achilles and made him immortal and there it was that the gods of Olympus gave oaths before the Titanomachy. In these waters, mortals and immortals gave oaths, sacred vows with heavy punishment for those who violated them. Waters deadly according to Pausanias.

Labours of Hercules: One of the twelve labours of Hercules is associated with Achaea. Eurystheus convinced that Hercules would not make it, asked him to trap the boar that lived in Erymanthos mountain and was destroying the crops of the farmers. However, despite the ferocity of the animal Heracles managed to capture the animal and saved the residents of  the island from calamity.
Myths associated with Hercules include the impressive vine of Pausanias and are related to Kerynitida deer. It is said that the horns of the deer from Mount Keryneio were caught in the tangled branches of the vine so Hercules managed to catch and finish in this way one of his labours.

Myths concerning Ladona: A special place in mythology has Ladon River. Love is a key element of these myths. In the banks of Ladona, Leucippus dressed as a woman was watching his beloved nymph Daphne. There it was that Daphne was transformed into the known to all plant laurel in order to escape the amorous appetites of Apollo. There Aphrodite met her lover Mars and also Pan used to wander around.

Dionysus' vine: Achaea is an area closely associated with the god Dionysus. This particular myth connects God with the ancient city of Aigeira. Each year at the celebration to honor the god, a vine grew and within 24 hours the vine would give fruit and was ready for harvest. It is said that the wine consumed that day was from this vineyard and was called the Ephemeral Vine.