In Turkey, one of the main problems of architecture and urban design seem to be the rapid transformation of physical environments, street experiences, and consequently the transformation of collective memory. One consequence of this basic problem can be the loss of the meaning of urban space. This calls for an historical examination of salient features of urban space that compose the collective memory. In this respect, this work aims to explore the changing physical characteristics of the boulevards through examining the transformation of collective memory. To provide empirical evidence for this, the work will study the transformation of collective memory of inhabitants from different age groups about the Atatrk Boulevard, by exploring the changing salient features of urban space and human experiences in space through a period of the last 60 years.