One of the biggest man-made structure in the world is Delta Project in Province Zeeland, the Netherlands. The ambition was to manage the sea water to keep some part of the country dry and liveable after the flood disaster in 1953.
The red lines are the Delta Project
NAP is Normaal Amsterdams Peil, that means average water level of the North Sea. In 1953 it exceeded the normal level and about 1.800 people died of the flood.
Appreciation of the nature conservation in the area.
Create the Delta Project as a tourist attraction.
The Delta Project keeps the surrounding areas dry including the city of Veere.
And the city of Middelburg.