The role of citizens in the construction of knowledge is undergoing a clear transformation from a passive position, as mere observers and/or receivers, to an increasingly participatory role. This issue, which is directly related to governance policies as well as to the ICT revolution, can be seen in the field of cultural heritage and particularly architectural heritage management. The present paper aims to generate methodologies to involve citizens as active agents who must be involved in a real way in decision making concerning the protection and enhancement of cultural heritage. The results present the creation of a rural heritage interactive cartographic viewer as a collaborative mapping tool. The conclusions drawn position the citizens of rural, dispersed, or vulnerable areas as informers and builders of knowledge about the cultural and architectural heritage of their environment in terms of citizen science. At the same time, it strengthens the development of innovation strategies in the intervention, management, and communication of the existing dispersed heritage in rural areas.