Central Park was the first American public park, pioneer in the adaptation of an European model following the style of picturesque and English gardening, the result of a group of transformations that intensified the landscape effects: over the ground there was a designed and drawn territory copying the nature and below it an efficient technologic system. The park gathers the skills of two kinds of non-built sites in the city: the image or recreation of nature in the urban reality and the potentiality of a place without occupation, a paradigm of the identification of a social and democratic use of leisure time. This space reserved in the middle of a rural landscape when the city was just an abstract prevision grip-shaped and that place only an useless mixture of swamps and rocks, was transformed as in the project of two founders of landscape architecture; today has become a relevant territory free of construction towards the compact city where is contained, a unique example of juxtaposition of nature and city.