3D technologies have become a very effective way of exploring and interacting with a wide range of different envir onments. In a Virtual Reality system, the visualized model should increase the provided informative level by means of datasets of information to be integrated in real-time navigation, in order to make the final user able to interact with the Virtual Environment and increase his knowledge about the landscape being explored. With this aim, a 3D predictive model for the Pisa coastal

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... ain has been created. This area is nowadays affected by a strong building programme which compromises the preservation of a potentially wide and still unexplored archaeological heritage. In order to monitor and detect the areas where a higher probability level of finding new sites is expected, a predict ive model has been conceived, starting from GIS collected data, and subsequently implemented in a Virtual Reality system. What we finally obtained is a 3D immersive, navigable landscape representing the Pisa coastal plain, in which is possible to look at the distribution of the known sites and have an immediate, intuitive perception of the areas which might have a significant archaeological interest. The user can navigate in, and interact with, the environment, finding out different kinds of information related to the archaeological record and, most of all, realizing which areas are likely to contain archaeological finds. One of the key points in this research is the use of web3D technologies, enabling a wide range of users to get a clear and intuitive visualization of complex three-dimensional models, which become very handy even for advanced off-line applications. Moreover, another important aim to be reached by such a research is to create a communication tool for making a broader range of people get interested in cultural contents.