She looked to the horizon, at first unable to see any dividing line between the "ground" and the "sky." But then her brain made sense of what she was seeing. There was a horizon, invisible, but defined by the massive, inconceivably distant constructs it partially occulted. They looked like fortresses, huge, blocky things, brutal in their simplicity of design, but, if this had been the "real" world and the horizon at its normal distance, those constructs would have been many times the size of the largest mountains.