Methodology of digital survey for the documentation of the archeological hetirage, three projects for UNESCO world heritage sites: Villa Adriana in Tivoli (Rome), the fortress of Masada (Israel), and the Basilica of the Nativity in Bethlehem (Palestine)

New media and digital tools offer us the possibility to experience, as visitors, travellers or even resident, 3d virtually reconstructed historic sites. Many critics have identified different issues that often inhibit widespread distribution and use of virtual heritage. This paper through some examples of three UNESCO World Heritage archeological sites, Villa Adriana in Tivoli (Rome), the fortress of Masada (Israel) and the Basilica of Nativity in Bethlehem (Palestine), tries to show and analyze, even critically, some of the different methodologies and investigation strategies at out disposal for the construction of equipment documentaries and surveys also to the virtual reconstruction of the archeological heritage.