The Gorgons are monstrous creatures covered with impenetrable scales, hair of living snakes, hands of brass, sharp fangs and a beard . They were said to live in the west, near the ocean, and guard the entrance to the underworld. A stone head or picture of a gorgon (gorgoneion) was often placed or drawn on temples and graves to avert evil, but also on the shields of soldiers. Such a head could also be found on the older coins of Athens.
Gorgons were said to have fire coming out of their hands and the skill to steal power from the gods. They are so strong they can kill anyone who stands in their way. They are considered the Queens of the underworld. The Gorgons can go anywhere they want and even look like humans. There is only one male Gorgon whose name is Nanas, the guard of Zeus. According to the myths, seeing the face of a Gorgon turned the viewer to stone.
In Greek mythology, blood taken from the left side of a Gorgon could bring the dead back to life, yet blood taken from the right side was an instantly fatal poison. Athena gave a vial of the healing blood to Asclepius, which ultimately brought about his demise.