This thesis explores the role of 3D reconstruction and visualization in improving the study and preservation of archaeological heritage. The paper provides an analysis of the evolution and methodology of digital 3D reconstructions within archaeological research, emphasizing their growing importance as a tool for the interpretation and presentation of prehistoric sites. Through case studies in Croatia, such as the Varaždinske Toplice and the Great Roman Theater in Pula, the work shows how digital reconstructions provide insight into archaeological sites, offering a platform for virtual restoration and education. Furthermore, it discusses the technical processes involved in the creation of 3D models, from initial data collection to final visualization, and emphasizes the use of interdisciplinary approaches that combine archaeology, technology and design. Additionally, the paper explains the significance of 3D visualization in archaeology, emphasizing its role in effectively communicating research results to both academic and public audiences. The integration of interactive visual tools such as virtual reality (VR) and video games enables a more immersive experience, increasing public engagement and understanding. Discussing the technical processes involved in creating 3D models and visualizations, the research highlights the potential of digital tools to not only support archaeological research, but also to foster a deeper appreciation of cultural heritage through dynamic and interactive learning experiences. The research concludes that 3D reconstructions serve not only as powerful tools for research and conservation, but also as effective media for public engagement and education, significantly contributing to the protection and understanding of cultural heritage.