Aristeas was supposed to have authored a poem called the Arismapea, giving an account of travels in the far North. There he encountered a tribe called the Issedonians, who told him of still more fantastic and northerly peoples: the one-eyed Arimaspi who battle gold-guarding gryphons, and the Hyperboreans among whom Apollo lives during the winter.
Centuries after his death, Aristeas appeared in Southern Italy to command that a statue of himself be set up and a new altar dedicated to Apollo.