ViziCities is an open-source 3D city visualisation platform powered by OpenStreetMap, WebGL and many other cutting-edge Web technologies. ViziCities not only allows you to explore any city in the world in 3D in your browser, it also lets you overlay data like live transport, crime, pollution, live social data, and weather. Think SimCity meets the real world! In this talk, Robin Hawkes, ViziCities' co-creator and Lead Developer will introduce you to the project and demonstrate its powerful methods for visualising the complex data locked within our cities.