After killing his family in a fit of madness induced by Hera, Hercules had to pay penance by completing 12 almost impossible tasks.
One of the most feared creatures in Greek mythology was the Chimera. It was a fire-breathing beast that had the body and head of a lion, the head of a goat extending from its back, and a snake's head at the end of the tail.
Achilles was killed by an arrow to the only vulnerable part of his body, his ankles. His ankles were vulnerable because Thesis held him by them when dipping him into the River Styx.
Dionysus was said to have invented wine. The wine was so good that Zeus promoted him to the status of a god!
Pygmalion was a king and a sculptor. He basically gave up on women and sculpted a statue that he fell in love with. He then prayed to the goddess to bring the statue to life so that he could marry her/it.
The Aegean Sea was named after King Aegeus because he threw himself into the sea.
Hephaestus was the blacksmith of the gods and made all their weapons. He is also referred to as the god of fire and metal works.
Zeus had to overthrow his father Kronos to become the leader of the titans.
Baby Hercules killed the snakes by strangling them with his bare hands.
Most Greek gods and goddesses were adopted by the Romans but were given Latin names. Hecate was called "Hekate".