Designed by Thomas Rau of RAU, the World Wide Fund for Nature head quarters in Netherlands has claimed to be the first zero carbon building in the world. The building is eco-friendly not only of it being the zero carbon but also with the people behind using it and how it was being used. Aside from being a zero carbon building, it also naturally ventilated, with solar arrays that provide electricity and hot water, a space for wildlife, and a back up biomass system. Before I forgot to mention, the WWF Netherland building is a renovation, which is think is an important aspect of being a sustainable building. With the astounding architectural design, I also find this building an attraction.
Source: Travel With Frank Gehry