More about the myth
Once upon a time, Zeus fell in love with io, the daughter of the river god Inachos. Zeus' wife Hera, being very jealous forced her husband to change the beautiful nymph into a cow. Hera sent a troublesome gadfly to chase io throughout the world. Her escape took her across the sea, now known as the Greek Ionian Sea, through the Ionian Ford, now known as Bosporus, all the way to Egypt. At the end of this stressful journey, io had travelled sufficiently far away from Greece to deserve Hera´s mercy and was transformed back into her original form. io finally found happiness and fulfilment.