Dia Island, located about 7 km north of Heraklion, is a small, uninhabited island known for its pristine beaches, crystal-clear waters, and rich biodiversity. Accessible by boat tours departing from Heraklion, it’s a popular spot for swimming, snorkeling, and hiking along its scenic trails. Historically significant as an ancient Minoan port, the island features remnants of ancient structures alongside a vibrant ecosystem, making it a Natura 2000 protected area.