In this chapter we will be exploring smart cities: those cities that succeed in the application of ICTs at a practical level and harvest the benefits of the IoT. We will discuss the application of ICTs and look at the aspects of digital data that are relevant in the ‘information value chain’ (IVC) that is being executed. We will follow the flow of data from the initial cue that starts the process, as picked up by sensors, the interfaces that provide interaction between the city and the individual citizen, and the intelligence behind the screens that is responsible for the delivery of applicable information to the citizen. We will start with a short sketch of ideas and ideals that underlie the smart city, followed by a discussion of building blocks – sensors, screens and actuators – that enable the city environment to interact with the citizen on the street. After that, we delve into the IVC, following the path data takes along that chain in the course of its value creation for the city.