City-Zen is an interactive spatio-temporal knowledge-browsing platform that aims to valorise cultural heritages. Considering the explosive growth of information, data and knowledge sharing can ensure valuable interdisciplinary applications. While many organizations propose relevant data sets, they are hardly accessed, analysed and reused because of the formats inconsistency and the inappropriate information browsing and visualization. The goal of the project is to valorise the existing cultural heritage through a citizen centric design platform. Based on information qualities, the use case of this project involves a user willing to discover the history of a region and to embark in a cultural journey in the past. This paper exposes the main functionalities City-zen application and shows how those latest should reach the different user needs. It illustrates how historical and cultural heritage valorisation can take advantage from the advancement of new technologies, multimedia & mobile and how those technologies should promote tourism services.