Dia island - uninhabited island north of Heraklion surrounded by small rocky inlets, only accessible on boat! The island is of great archeological interest as it was populated during Minoan times and near the bay of Agios Georgios, a harbour settlement was established. The undersea discoveries of Jacques Yves Cousteau in 1974-5, provided evidence suggesting that there stood one of the biggest and most important ports in the whole island of Crete. The harbour appears to have sunk due to the destruction caused in the 1450 bc by the eruption of the volcano of Santorini and visitors are able to see remains of it if they dive with mask! Awesome private sailing trip!