The Black Sea lies north of Anatolia, with Colchis at its eastern end and lands described by ancient Greeks as Scythian along much of its northern hinterland. It must be distinguished from the Sea of Azov. Ancient Maeotis was that smaller northern body of water, connected to the Black Sea through the Cimmerian Bosporus, the strait now called Kerch; it was not the eastern half of the Black Sea. Greek writers used Pontos Euxeinos, rendered in Latin as Pontus Euxinus, for the larger sea. Strabo explains that it had formerly been called Axeinos, inhospitable, and associates the more favourable name with the development of Greek settlements. His explanation is an ancient account of naming, not a precisely dated record of a universal change in usage.

In heroic narrative, the sea could function as a frontier of danger and unfamiliarity. Jason and the Argonauts sail from Thessaly through the northern Aegean and the waters beyond the Hellespont towards Colchis. The Argo is celebrated as an extraordinary early vessel, but claims that it was the first ship should be understood as mythic language rather than a history of shipbuilding. The communities encountered on the journey are not inhabitants of an empty world waiting for Greek discovery. They already have rulers, customs and relationships of their own. The voyage makes the crew negotiate those different societies as well as confront the sea.

One of the most important encounters is with Phineus, the blind seer tormented by the Harpies. The winged Boreads, Zetes and Calais, pursue the creatures and secure relief for him. In return, Phineus explains the route ahead and warns the Argonauts of the Symplegades. These Clashing Rocks stand at the entrance to the Euxine and crash together upon whatever passes between them. He tells the crew to release a dove first and watch its fate. The bird passes through with the loss of its tail feathers. The rowers then drive the Argo into the passage, and Athena helps it escape, although the rocks catch the tip of the stern. In the poem, their movement ends once the ship has passed safely.

At the eastern shore lies Colchis, the kingdom of Aeëtes, a son of Helios. The Golden Fleece hangs in a grove sacred to Ares, protected by a dragon that does not sleep. The landscape is presented through the demands of Jason's quest: fire-breathing bulls, a field sown with dragon's teeth and the armed men who rise from it. Medea, Aeëtes's daughter and a devotee of Hecate, provides the knowledge that makes the tasks survivable. Her help also creates a conflict of loyalties within the royal family. The association of Colchis with magic belongs to the Greek narrative's treatment of the place; it is not evidence that its historical inhabitants possessed supernatural powers.

The region's northern and southern coasts connect the voyage with other bodies of tradition. Herodotus describes Scythian peoples, their landscapes and their customs in substantial parts of Book 4 of his Histories. That book also preserves stories about ancestry and encounters between peoples, which must be distinguished from direct observation. The Amazons are the legendary women warriors associated with the Thermodon and other locations in ancient storytelling. Their conflicts with Greek heroes and their appearance in the Trojan cycle link the Black Sea with the stories of Heracles, Theseus and Penthesilea. They should not be treated as a documented kingdom whose institutions can simply be recovered from myth.

Herodotus tells a particular story in which Amazons join young Scythian men and become ancestors of the Sauromatae. This is not the same claim as making the Amazons founders of every Scythian royal family. Nor should repeated literary claims about Amazon bodies be presented as established facts about historical women. The significance of the tradition lies partly in how Greek authors imagined unfamiliar relationships between warfare, marriage and gender. Different tellings move the Amazons' homeland and ancestry, making it necessary to identify the version being used instead of assembling every detail into a single geography.

Io's wanderings provide another connection between the sea and mythic travel. Transformed into a cow and driven across distant lands, she encounters Prometheus in Prometheus Bound and receives a prophecy of journeys still ahead. The play connects her route with Scythian territory, the Caucasus and a Bosporus explained through the idea of a cow's crossing. Its Cimmerian setting should not automatically be substituted with the southern strait at modern Istanbul: ancient itineraries and uses of the name vary. Io's journey eventually leads towards Egypt and the restoration of her human form, linking distant regions through a story of pursuit, suffering and promised descendants.

Historical Greek settlement around the sea developed during the Archaic period and continued through later centuries. Sites such as Olbia provide archaeological evidence of towns connected with Greek language and material culture, local populations and regional exchange. Grain, fish and other goods moved through coastal ports, and the sea became a route of communication rather than simply a barrier. These networks existed alongside the narratives of remote dangers, not only after such stories had disappeared. The same coast could therefore be a practical destination for traders and the literary setting of a voyage beyond familiar experience. The sea can therefore be understood both as a real region and as a landscape shaped by ancient storytelling.