The access to cultural heritage resources is a large-scale phenomenon which relates cultural institutions with a very diversified audience whose expectations are modifying. Digital technologies play a decisive role in this change: just think of the revolution brought by smartphones and tablets, which have the potentialities of desktop pc together with portability. The article focuses on these technologies, looking at mobile devices as tools that enable new relationships between visitors, places and stories, analyzing national and international experiences which propose an innovative use of such devices.