Wilhelmstein is an artificial island with an area of 12,500 square metres (3.1 acres) in lake Steinhuder Meer, located in the Hanover Region, Northern Germany. The island was created in the 18th century as a fortification by Count William of Schaumburg-Lippe, ruler of this small German state. The man-made isle (Count Wilhelm of Schaumburg-Lippe had the island built between 1761 and 1765 for his military fortress) .. Since then the island hosts the Wilhelmsen fortress (German : Festung Wilhelmstein). Today the island, close to Hagenburg, is a popular destination for tourists. It can be reached by so-called 'emigrants boats' from Steinhude and Mardorf.
52°27′37″N9°18′28″E / 52.4603°N 9.3078°E