"However, after numerous fatal accidents during construction, production was halted. A combination of lack of money and lack of willingness meant that work was stopped permanently, and the alien like structures remain as if in remembrance of those lost. Indeed, rumors in the surrounding area suggest that the City is now haunted by the ghosts of those who died."
Laziness lost out over curiosity
http://listverse.com/travel/top-10-interesting-abandoned-places/
"However, after numerous fatal accidents during construction, production was halted. A combination of lack of money and lack of willingness meant that work was stopped permanently, and the alien like structures remain as if in remembrance of those lost. Indeed, rumors in the surrounding area suggest that the City is now haunted by the ghosts of those who died."