Photographic Memory is a project that uses publicly available Flickr photography to gain insight into the dynamics of tourism in urban
environments. It is an effort to explore the spatial-temporal characteristics of the use of the city’s infrastructure, to uncover its dynamics and to identify bottlenecks. For this research, the metadata of 2,849,261 photos was downloaded from Flickr and stored in a spatial database. From this dataset, 484,346 photos were located in Amsterdam. The most visited places and touristic routes in the city were identified by making use of sophisticated clustering and routing algorithms. Despite several imperfections of geosocial data, we concluded that it provides meaningful insights into the spatio-temporal patterns of tourists in urban spaces and are a valuable addition to traditional tourism surveys.