Serifos, a rock made of iron rooted in the middle of the sea, was known for its ore deposits from the ancient times. It was inhabited by the Boeotians, 3000 years ago, having Diktis and Polydektis as kings, and flourished so much that it had had, since the 6th century B.C. its own currency. This is where Perseas was born, the legendary son of Zeus and Danae, the only daughter of Acrisius, the King of Argos, who, being afraid of a prophecy given by the Delfoi oracle that his grandson will kill him, first locked her in the basement of the palace and, then, when Zeus left her with a child by appearing before her in the form of golden rain, put the mother and the child in a box and threw them at sea; the gentle waves of the Aegean Sea led it to Serifos. Perseas, once he became an adult, wanting to release his mother from the suffocating courtship of Polydektis, wore the winged sandals and by holding the mirroring shield of Goddess Athena, cut off the head of Medusa, the dreadful monster that turn into stone anyone who looked at it; the blood of Medusa inseminated Earth to give birth to Pegasus, the winged horse that was reasonably regarded by many as an offspring of Serifos. Perseus showed the head of Medusa to the conniving King Polydektis, turning him into stone and made the doting Diktis king of the island and husband of Danae.
Odysseus has also visited this island when returning to Ithaca, according to the legend, but he did not have a good time in the cave of the Cyclops Polyphemus, who sent him off by targeting his ship with a rock outside the Koutalas cove. Today, there are still remnants of Cyclopean walls overlooking the Aegean Sea.
Source: Μunicipality of Serifos