Thrinacia (Θρινακίη) — mythic land of Homer's Odyssey

Thrinacia — The forbidden feast that sank the last ship. The Cattle of the Sun (Odyssey 12.260–425).

The pasture-island of Helios, where the Sun keeps herds that never breed and never die. Two prophets gave Odysseus the same warning: touch nothing here. A month of foul winds, an empty hold, and one mutinous speech later, the crew ate the one meal in the world guaranteed to kill them all.

Odysseus never wanted to land. Teiresias in the Underworld and Kirke on Aiaia had both delivered the same dread-heavy warning: on Thrinacia graze the cattle of Helios — seven herds of cattle, seven flocks of sheep, fifty in each, deathless, tended by the Sun's own daughters. Leave them untouched and you may yet limp home; harm them and ship and crew are doomed. Odysseus wanted to row straight past. But Eurylochos protested that the men were dropping with exhaustion, and the crew swore a great oath to eat only what they carried. They landed. The winds turned. And stayed turned.

For a whole month the South Wind pinned them to the beach. The stores ran out; the men scraped after fish and birds with bent hooks while hunger gnawed their bellies. Odysseus walked inland to pray for a way out — and the gods poured sleep over his eyes. It was all the opening Eurylochos needed. All deaths are hateful, he told the starving crew, but death by hunger is the most miserable; better one gulp of brine in a shipwreck than being whittled away slowly. Drive off the finest cattle, sacrifice to the gods, promise Helios a temple. The men agreed instantly.

Then the island turned uncanny. As the crew feasted, the gods sent prodigies: the flayed hides began to crawl across the ground, and the meat — roast and raw alike — lowed on the spits with the voices of living cattle. They kept eating anyway, for six days. Above them, Lampetie ran to her father, and Helios stood before Zeus with an ultimatum that could unmake the cosmos: avenge my cattle, or I go down and shine among the dead. Zeus told him to keep shining. He would handle the ship personally.

The seventh day the wind dropped, and they sailed — straight into a black squall that Zeus capped with a single thunderbolt. The ship spun, split, and filled with sulphur; every man went into the waves, bobbing like sea-crows around the wreck until the god took away their homecoming. Odysseus alone, lashing keel to mast with a leather backstay, rode the storm — swept back through Charybdis' maw, then adrift nine days until Ogygia. The poem announces this crime in its opening lines: fools, who ate the cattle of the Sun.

Denizens

Helios (Ἠέλιος) — The all-seeing Sun; owner of the herds, and the one witness you cannot avoid.
Phaethousa (Φαέθουσα) — Nymph daughter of Helios, herdswoman of her father's cattle.
Lampetie (Λαμπετίη) — Her sister — who flashed the news of the slaughter straight to the Sun.
The cattle of the Sun (βόες Ἠελίοιο) — Broad-browed, deathless, 350 head — they never calve and never die.

Perils

The weather: Contrary winds pin you ashore for a month until starvation does the tempting for the gods. The trap here is a calendar.
The menu: The only food on the island is sacred and immortal, and eating it is the one act two separate prophets warned you about by name.
The witness: Helios sees everything on earth by job description. On his own island there is no such thing as an unwitnessed crime — and his complaints department is Zeus.

The crew's toll: All hands, 1 ship — Zeus split the last ship with a thunderbolt; every remaining companion drowned. Odysseus alone, lashed to keel and mast, lived to drift to Kalypso.

“Fools — they devoured the cattle of Helios Hyperion, and he took from them the day of their homecoming.” — Odyssey 1.8–9

Traditional location: Sicily. Identified since antiquity with Sicily itself — Trinacria, the three-cornered isle of capes Pelorus, Pachynus and Lilybaeum — whose rich coastal pastures fit the Sun-god's herds.