All of the body usually, and all non-body items that I have in immediate memory if i focus (e.g. if i close you eyes now I see my hands and outline of the computer and the bed, if i concentrate i also see window and the dog even though they are almost outside my field of view). It works correctly when moving or turning head, too. When i was younger i thought everyone has this, formed due to conditioned association - you always see your limbs where proprioception tells they are. It's not like imagining either - it lacks the colour entirely, its involuntary (for some of the image), etc.