In his book “Making of Urban America” J.W. Relp foresees how Central Park will eventually become a unique large green space surrounded by the huge buildings in New York.
Indeed, New York's Central Park has remained the most significant green space within high-rise Manhattan, but a few other green spaces can still be found.
Making of urban America. Princeton, N.J: Princeton University Press, 1965. P. 331-339. (Delirious New York, p.20)