In today's global economy, the tourism industry plays a vital role as an engine for economic and social development. Consequently, the competitiveness of tourism destinations has become a decisive strategic advantage. A destination's success in attracting tourists and creating a memorable experience is heavily influenced by the quality and efficiency of its physical structures. This study aimed to provide a model for measuring the impact of physical structures on the tourism destination competitiveness of Sarein city. The research method was descriptive-survey. The statistical population consisted of tourism experts and stakeholders in Sarein; sampling was conducted among 423 individuals. Data were collected using a researcher-made questionnaire and analyzed with SPSS and Smart PLS software. Findings indicated that all four components of physical structure (economic, socio-cultural, environmental, and services) had a positive, direct, and significant impact on Sarein's competitiveness. Based on the final model, the services component with an impact factor of (number) had the highest share, and the economic component with a factor of 0.790 had the lowest share. Furthermore, ranking the indicators within each component showed that attracting investment, human resource training, preserving natural habitats, and designing pedestrian pathways were the most important items in each dimension, respectively. The research model confirms that balanced and planned development of physical structures, particularly the services and infrastructure sector, is the primary factor in enhancing Sarein's competitiveness as a tourism destination. It is suggested that managers and planners focus their resource allocation and policymaking based on the priorities identified by this model.