Hamburg has become a world-class innovation centre indicating the direction of ecological transformations in the 21st century. Internationale Bauausstellung (International Building Exhibition) IBA Hamburg 2006–2013 is a rebuilding process unfolding over many years and being an answer to the question about the architectural future of cities; it is a place where the latest achievements of building technology and designs of the architecture of the future are presented. Internationale Gartenscha (International Garden Show) IGS Hamburg 2013 offers a new municipal park in Wilhelmsburg to its inhabitants, where they can find leisure, recreation and educational grounds. Modern residences, office buildings and shops were built on the edges of the park within the IBA. The whole creates a harmonious green space defining a new quality of living. These enterprises show how to transform a neglected urban space in a sustainable manner so that it is both attractive for people and environmentally-friendly.