In the late 1960s, architect Oscar Newman proposed a plan that seems both crazy and exciting - he suggested building a city underneath Manhattan. Newman wanted to create a hollow sphere with a volume of approximately 5 cubic kilometers, placing it deep beneath Times Square. How could such large voids be created in the Earth's crust? The answer is simple - nuclear bombs would be placed in prepared wells and detonated to create the desired effect. The "equator" of this sphere would become the "floor" for streets, office buildings, shops, and other structures to be built on. The lower hemisphere would then become an underground city within a city, a kind of honeycomb where energy sources could be located.