I love the idea of real world, physical implementations of data visualisation. We spend so much time behind the screen that it is really easy to just ignore something new and move on. But when its IRL, you can look at it from different angles, you can touch it and just experience the data differently. This post on hyperallergic is of a glass sculpture by Norwood Viviano that shows the big cities of the world changing overtime. It has some interesting ways of representing different data through the glass objects and the projection of the city on the far wall is fantastic.