In Homer's epic poem, The Odyssey, the mythical Greek character Odysseus builds a raft and attempts to return to his home island of Ithaca. But Odysseus' enemy, Poseidon, the Greek god of the sea, unleashes a storm and the raft is destroyed. Half-drowned, Odysseus washes ashore on the island of Corfu. He staggers into an olive grove and collapses.