Dia is a prominent island located just off the northern coast of Crete, a short distance from Heraklion, in the Cretan Sea. Its elongated shape makes it easily visible from the city and much of the surrounding coastline.

The island holds both historical and mythological significance. According to tradition, its name is linked to Zeus, while in antiquity Dia is believed to have functioned as a natural harbor for Knossos, offering shelter from northern winds and supporting maritime activity in the region.

Its landscape is defined by rocky terrain, low vegetation, and a series of small coves with clear waters. Despite the dry conditions, the island supports plant and animal species adapted to its environment, and the wider area is recognized for its ecological importance.

Dia is a popular destination for boat trips from Heraklion, attracting visitors for swimming, snorkeling, and exploring its secluded bays. It is uninhabited and lacks extensive infrastructure, which helps preserve its natural and relatively untouched character.

Combining elements of history, mythology, and natural beauty, Dia stands out as a distinctive feature of the seascape north of Heraklion and an integral part of Crete’s coastal identity.