The Citadel, the world’s first floating apartment complex, gives a new meaning to waterfront property. The Netherlands, which is mostly wetlands, faces the issue of pumping out water to protect tracts of land below sea level, known as polders. The Citadel was designed by Koen Olthuis of Waterstudio in the Netherlands as part of the New Water development, an urban development built on a former polder in the city of Westland. Construction for the Citadel will begin in March 2010. When completed, the building will include 60 luxury apartments, a car park and a floating road. The complex will utilize greenhouses and water-cooling techniques to promote environmental sustainability.