I am a new author - just wrote my first novel called The Wall. The wall was constructed around a nuclear blast zone in 2020 and 21. It was simply bulldozed made up of the rubble of cities, farms, debris, even live stock. It's original purpose was to keep people out of the hot zone because relatives of victims near the wall hoped to look for bodies and possessions. I have more specific descriptions in parts of the book. I do have a layout in mind.
Later a prison is created behind the wall giving new purpose to it's being..