The Discworld is the fictional setting for all of Terry Pratchett's Discworld fantasy novels. It consists of a slightly convex disc (complete with edge-of-the-world drop-off and consequent waterfall) resting on the backs of four huge elephants which are in turn standing on the back of an enormous turtle, named A'Tuin, (similar to Chukwa or Akupara from Hindu mythology, though "world turtles" are common to many disparate cosmologies) as it slowly swims through space. The disc itself is roughly 10,000 miles wide, giving it a surface area two fifths that of the Earth.