With the continuous rise in urban populations, cities are under increasing pressure to develop and optimize infrastructure and services to meet the evolving needs of their residents. This rapid urbanization presents significant challenges in efficiently managing resources, mobility, and public services. In response, digital twin technology has emerged as a promising solution for the development of smart cities. By enabling the collection and analysis of real-time data, this technology enhances urban system efficiency and allows local authorities to make more proactive and predictive decisions. This study introduces a novel approach for creating an immersive virtual environment that replicates the functionalities of a smart city. Through this methodology, critical challenges in urban management, such as infrastructure optimization, resource allocation, and mobility improvement, are addressed. The project also leverages the Unity platform to develop interactive models that simulate various urban dynamics, including waste management, transportation, and environmental monitoring, with the goal of providing a deeper understanding of urban challenges and supporting more effective urban planning. A case study conducted in the El Qods neighborhood, located in the eastern part of Oujda, Morocco, demonstrates the effectiveness of the proposed solution in optimizing energy use, managing infrastructure, and enhancing urban planning, including the allocation of green spaces.