The digital reconstruction of missing or damaged historical buildings or the analysis of periodisation in the development of a historical building, a historical town or park, has a special scientific importance and greatly increases the knowledge of heritage in general.An application that might be less striking, but will certainly be of great significance in the future, is the application for heritage tourism.In addition, some comments have to be made.The relationship between heritage and tourism is characterised by misunderstandings and prejudices.For instance, many historians and researchers are not very fond of tourists, because they are convinced that the world of tourism is far removed from the scientific community.Tourists would only be interested in the well-known icons such as the Great Wall or the Leaning Tower of Pisa.And they would have no interest in the lesser, but scientifically just as interesting or important, objects.That is not quite true.There really is a whole group of tourists who, for various reasons, are interested in heritage and have enough background knowledge to understand at least the outlines.On the other hand,it is certainly true that the communication from the academic world, with maps, theses, scientific articles and the like, is just not accessible to the layman,even if he or she is, in principle, very interested in the subject.Here digital reconstructions come in handy.Using digital reconstructions, interested tourists can see how the ruins looked before they were ruined.With augmented reality one can walk through the historical environment: which is certainly a tourist experience.Of course, the rules of communication and the boundaries of the popularisation should be considered.But generally great opportunities are ahead.