Social, cultural and physical characteristics related to the environment provided data to the design, influenced the formation of architectural forms specific to the place, and each environment produced its own identity. One of the most important elements in the formation of a region, settlement and city identity is the architectural identity that reveals the identity of the building / building groups. In the study, it is aimed to reveal the criteria that affect the formation of architectural formation and settlement characteristics of 4 and 5 star thermal tourism buildings in the Karahayıt region where thermal tourism activities take place. Although there are studies on different subjects in the region, the architectural identity analysis performed specifically for accommodation facilities is unique and first. In the study, "Architectural Identity Analysis Chart" was created by conducting literature research. With this scheme, on-site observation and in-depth interviews were carried out. When the findings obtained from the analyzes were evaluated, it was seen that the most important factor in the architect's decision making in the scale of the settlement was the environmental characteristics. On the other hand, it is seen that legal factors as well as environmental characteristics are effective in decisions made at building scale. The "Architectural Identity Interaction Scheme" was created by interpreting the findings and determining the way the architectural identity components are directly or indirectly affected by each other. This scheme is important in terms of researching the thermal tourism architecture of the region and preparing planning design strategies for the future, conducting a study in the content of design guides, making comparisons of thermal tourism architecture in different regions, determining the place of the architectural identity in tourism buildings and performing some improvement interventions.