America is an irradiated wasteland.
Within it lies a city.
Outside the boundary walls a desert.
A cursed earth.
Inside the walls a cursed city,
stretching from Boston to Washington, D. C.
An unbroken concrete landscape.
living in the ruin of the old world
and the mega structures of the new one.
Mega blocks. Mega highways.
MegaCity One.

Mega-City One is a huge fictional city-state covering much of what is now the Eastern United States in the Judge Dredd comic book series and its spinoff series. The exact geography of the city depends on which writer and artist has done which story, but from its first appearance it has been associated with New York City's urban sprawl; originally it was presented as a future New York, which was retconned as the centre of a "Mega-City One" in the very next story.