text: what are hades????where is it situated????and why?? the bible tell about the hades!!!! but what does it means.......to us hades was one of the greek gods.  he was the brother of zeus and poseidon.  he was ruler of the underworld which was were the dead went.  if you were really bad you went to a particularly bad part of the underworld called 'tartarus' but if you were particularly good then you went to 'elysium'. mythology never needs a 'why'.