This paper presents the concepts, implementation details, and evaluation objectives of ActivitySpot, an infrastructure and toolkit aiming at supporting localized activities performed by occasional visitors. We are particularly interested in enabling a user experience that is activity-centered and
that makes the most of the available ubiquitous computing resources for carrying out a localized activity, while not imposing to visitors any specific technological requirement. We adopted an activity-centered approach to the design of the conceptual framework supporting our work and we aim to evaluate how adequate is this approach to enable an engaging user experience for occasional visitors.Fundação para a Ciência e a Tecnologia (FCT)