The World Turtle, also called the Cosmic Turtle or the World-bearing Turtle, is a mytheme of a giant turtle supporting or containing the world. It occurs in Hindu mythology, Chinese mythology, and the mythologies of some of the indigenous peoples of the Americas. The comparative mythology of the World-Tortoise discussed by Edward Burnett Tylor (1878:341) includes the counterpart World Elephant.

The Discworld is the fictional setting for all of Terry Pratchett's Discworld fantasy novels. It consists of a large disc resting on the backs of four huge elephants which are standing on the back of an enormous turtle, named Great A'Tuin as it slowly swims through space. Magic is an everyday feature of life on Discworld, whilst even science has unearthly qualities. The similarities to Planet Earth only exacerbate the strangeness of Discworld itself.