Interfaces in urban spatial structure may be understood as a type of spatial form that establishes relationships between distinctive parts of a whole, characterized by their degree of connectivity and integration and porosity. In order to characterize the way spatial interfaces may be formed between parks and urban fabric, this paper reveals a typology of interface occurring at two different Paris parks, the Bois de Boulogne and Parc Monceau, as set in Baron Haussmann’s redesigned urban fabric of Paris in the mid 19th century. A review of interface in these two parks reveals distinctive transformations through urban development. Figure ground analysis is used to highlight the spatial configuration of interface with intensive study of the 16th Arr. Undertaken using Space syntax methods of axial angular and segment analysis to understand how the urban fabric south of the Bois de Boulogne composes integration and forms centers in the 1865 and 2020 urban plans.