The demo paper “ClustΤour: City Exploration by use of Spatio-temporal Analysis and Clustering of User Contributed Photos” by S. Papadopoulos, C. Zigkolis, S. Kapiris, I. Kompatsiaris, and A. Vakali received the best demo award at the International Conference on Multimedia Retrieval 2011, organized by the ACM, at Trento, Italy.