Fuhlensee is a lake in Holstein Switzerland, in the North German state of Schleswig-Holstein.It lies on the River Schwentine between the Kronsee (upstream) and the Lanker See (downstream), south of Wahlstorf Manor House.It has a surface area of 0.14 km², is up to 6 metres deep and has an elevation of about 20 m above sea level (NN).There is a snack bar on the northern shore for boaters.