Well, Abel, if I remember things right (I was only in Edinburgh ONCE in my life, and that was back in April of 2002!), there IS something at the bottom of the rocks if you move the camera any further down, so I understand why hduk - wishing to only photograph Calton Hill - could not move any more. Else either houses or the cemetery (?) would have come into the frame.
As it is, it is a bit of a classic, and it is not, since most photos DO show what is there at the bottom! (I think)