The mythology of the ancient Greeks is positively packed with stories involving weird and wonderful creatures. Represented on pottery, in sculpture, and in literary tradition, they typically create havoc with the best laid plans of the Greek heroes but they could also prove helpful in certain situations. Hercules, Odysseus, Theseus, Perseus, Bellerophon, and Jason all had to fight monsters which were very often a mix of other more familiar creatures or were just downright bizarre. The heroes usually won, of course, and their battles with these monsters made them seem even more heroic. The imaginative blend of animals also served to represent the disorder of both the animal and foreign kingdoms in the Greek view of the world and perhaps also represented the unfamiliar wildlife of distant lands. The triumph of Greek heroes over these terrible creatures was an entertaining metaphor for the perceived superiority of the Greek way of life, the victory of light over darkness, reason and order over chaos.
You can read more extraordinary tales from Greek mythology in our article here.