The Netherlands has one of the best flood control systems in the world and new ways to deal with water are constantly being developed and tested, such as the underground storage of water, storing water in reservoirs in large parking garages or on playgrounds, http://water.dhv.com/EN/Water_management/Documents/2008%20Leaflet%20Innovative%20water%20storage%20techniques.pdf Rotterdam started a project to construct a floating housing development of 120 acres to deal with rising sea levels.