Abstract: In this paper, we reflect on two observations. The first one is that sharing artifacts such as photographs is a powerful and emotionally-rich form of social interaction. The second one is that we all associate emotions to the places that we visit. For these reasons, we are interested to explore new tools for capturing the ambience of neighborhoods and cities. We are also interested to develop ways for people to share these ambiences both online and in augmented physical places. We introduce our ideas in this domain and illustrate them with two ongoing projects: AmbiGrabber and Boxes and Lenses. With these systems, our goal is to create a basic set of technologies that will allow us to build and experiment with social applications in urban environments.