Vauban

In Freiburg, I stayed in Vauban. It's a neighborhood which is unique in two aspects. 1) It was conceived by (5000) people getting together and deciding to build it from scratch, which means that each flat is unique. 2) It's green: tramway and bicycle are the main transportation modalities (cars in lots more than half a mile from the house, and 70% of people just gave them up). Recycling everywhere, vegetation on roofs, etc. It's such a big deal that it's part of the World Expo in Shanghai. Check it out here.