South America, home to some of the biggest giants ever. The biggest land animal ever to walk the Earth, Argentinosaurus lived in the South American plains. Mapusaurus another giant creature, however a carnivore. Giganotosaurus, even though not featured within the show, also was massive, bigger than Tyrannosaurus, would rival Spinosaurus, and killed Argentinosaurus. South America was certainly a land of giants.