Roads go often straight from one point to another. They turn right or left when they meet an obstacle or when they need to connect to other roads. There is only one element that subverts this scheme: the roundabout. Roundabouts were invented by men to fool the roads. In a roundabout a road gets lost: it keeps turning again and again. It forgets its destination and even its starting point. In addition, roundabouts have something magical, just like the eraser at the end af a pencil: if you make a mistake, you can just try again after one round.