The Flevopolder is an island polder forming the bulk of Flevoland, a province of the Netherlands. Created by land reclamation, its northeastern part was drained in 1955 and the remainder—the southwest—in 1968.
Unlike other major polders, such as Noordoostpolder and Wieringermeer, the Flevopolder is surrounded by bordering lakes or below-sea-level channels. These are the IJsselmeer, the Veluwemeer, Ketelmeer, and Gooimeer. It is the largest artificial island in the world.
Levees and dikes were first built around the polder. However, unlike similar projects, the internal water was then drained by diesel and electric pumps. The Flevopolder together with the Noordoostpolder forms the province of Flevoland, the most recent province to be added to the Netherlands.
Its southwestern point is close to Amsterdam and its opposite end is close to Kampen, Overijssel. It has three highly dominant settlements in terms of distribution of population.
According to en.wikipedia