Architect Oscar Newman’s tongue in cheek 'Plan for an underground nuclear shelter' (1969) was a proposal for a replica of Manhattan to be built deep underground, a labyrinth of buildings encased in a huge metal sphere.
“Manhattan could have a half-dozen such atomic cities strung under the city proper…the real problem in an underground city would be the lack of views and fresh air, but its easy access to the surface and the fact that, even as things are, our air should be filtered and what most of us see from our window’s is somebody else’s wall.” Oscar Newman
