The scientific approach of collective mapping, defined as the large-scale mappings and the study of operational systems in the city, is limiting for me. In such approach, only the basic relationships among different organizations and places are being constructed, meaning that this top-down study could not truly reflect ones’ potential experience in the city. To go beyond this limitation, I seek for an approach that aims to construct a sensational understanding of the city from an outsider’s point of view, which is an outsider of the city as well as a strange outsider from the typical outsiders that study through scientific approaches. Through the sensational understanding, what could happen in the city and what the city could be like could be defined. I studied Thessaloniki through Archaeology of Nostalgia. Nostalgia refers to a process of recalling a sensational experience of an individual, which defines ones’ intimate relation between objects and experiences beyond the logical relation of functionality. Archaeology, on the other hand, refers to the study of material culture, like of mementos, to reveal the potential experience associated with different objects. Based on the series of Archaeological speculations, it reveals different potential experiences that are bound to the objects in Thessaloniki, in particular the various situations, interactions, tensions, and visions, hence defining a sensational interpretation besides scientific interpretation. The research starts with speculating the postcards, suggesting the idea of an imaginary reality of the city, which provides the basic ground to study the city away from the limitations of reality such as the location and time. Also, it leads to the understanding that each object suggests multiple experiences that one may have, such as one could see a fountain as a ruin, a public facility, religious object, etc. In order to generate a more comprehensive interpretation of the city, additional objects from the reality are introduced in each phase of archaeological speculations by association, like a segregated situation could associate the segregated old train station. Furthermore, the additional objects also suggest multiple experiences, which allow more possibilities for speculation. From the above concepts, I further developed the main drawings and the Modi Operandi models based on intuition, which resulted in an unpredictable combination of objects and the deconstruction of reality. Through a sequence of speculation, interplays of the different experiences that are embedded in various objects, potential situations, interactions, tensions, and visions have been revealed in the drawings. An imaginary reality of what could have happened in Thessaloniki emerged as a sensational interpretation of the city. This exercise could be a medium to rethink reality in terms of urbanism, usages of space, and architecture, etc. It also questions the approach in understanding the complexity of a city, and the archetype of Thessaloniki and different objects in what they should be.