Discworld

A flat disc balanced on the backs of four elephants which in turn stand on the back of a giant turtle. 

Planet June's Discworld amigurumi 'pattern'.

Terry Pratchett's books frequently parody or take inspiration from J. R. R. Tolkien, Robert E. Howard, H. P. Lovecraft and William Shakespeare, as well as mythology, folklore and fairy tales, often using them for satirical parallels with current cultural, political and scientific issues. 

Is the Earth Actually Flat?

Admiral Richard E Byrd - Hollow Earth Video Interview