Duisburg; Inner Harbor; originally the central port of Duisburg. As part of the International Building Exhibition IBA Emscherpark in the 1990s as a result of structural change; a residential area with cultural facilities and office space was created here in the immediate vicinity of the city center.Marina Duisburg; yacht harbor built in 2001 after the master plan by Sir Norman Foster. In the background the "Five Boats" office building (design: Nicholas Grimshaw and Partners; 2004).Duisburg; October 17; 2007.