The Contest for Athens
Competing for the patronage of a new city, Poseidon struck the ground and produced a saltwater spring; Athena planted an olive tree. The citizens chose the more useful olive, and named the city Athens. The defeated sea god flooded the surrounding plains in his rage.
The Ten-Year Curse on Odysseus
Odysseus blinded Poseidon’s son, the Cyclops Polyphemus — and then boasted his real name. From then on Poseidon threw obstacle after obstacle in his path, stretching a homecoming of a few weeks into ten years and drowning every one of his companions.
The Origin of the Minotaur
King Minos of Crete vowed to sacrifice a white bull risen from the sea, then greedily kept it. So Poseidon made the queen fall in love with the bull; she bore the bull-headed Minotaur — later shut away in the labyrinth built by Daedalus.