Antwerp is a belgium town on the River Scheldt, with one of the biggest port in the world. As you can see on the following image, The Port of Antwerp is very close to the town itself.
This proximity became a danger for the city when recent studies revealed a high flooding risk, so the authorities decided to build along the dock a 7 km long dike. Without the direct link between the port and the town, all this part was destined to be a free space for the inhabitants as described in the two pictures below.