In Greek mythology the Gigantes (γίγαντες) were (according to the poet Hesiod) the children of Uranus (Ουρανός) and Gaia (Γαία) (spirits of the sky and the earth) where some depictions had them with snake-like legs. They were involved in a conflict with the Olympian gods called the Gigantomachy (Γιγαντομαχία) when Gaia had them attack Mount Olympus. This battle was eventually settled when the hero Heracles decided to help the Olympians. The Greeks believed some of them, like Enceladus, to lie buried from that time under the earth and that their tormented quivers resulted in earthquakes and volcanic eruptions.