Plato's "Allegory of the Cave," George Orwell's "The Animal Farm," Aesop's "The Tortoise and the Hare" and Dr. Seuss' "Yertle the Turtle" are examples of famous allegories. The movies "Avatar" and "The Wizard of Oz" also have some elements of allegory.
"The Animal Farm" and "Yertle the Turtle" are both allegories of totalitarian regimes. The first criticizes the political leaders of Soviet Russia, while the second has features similar to the story of Adolf Hitler's dictatorship.The story of "The Tortoise and the Hare" shows that, in reaching success, hard work may be more important than natural talent.
The events depicted in "Avatar" have some common features with contemporary events. The characters from "The Wizard of Oz" may be metaphors for various human personality traits.