rowing, swimming, sailing and windsurfing; however, kitesurfing and model boats are prohibited. Every year the Erich Berscheit Cup is contested by holding a regatta. It is named after the former mayor of Eschweiler, Erich Berscheit, who decided to create the lake. Rules for Visitors Visitors are required to follow specific behaviors with regard to the lake: Dogs must remain tethered, so that they do not interfere with spawning and nesting sites on the shore. Grilling and lighting of shishas are prohibited. Especially in the summer months, the fire risk is very high. There is a strict ban on the feeding of birds for the protection of the animals. Flora and Fauna The Blausteinsee is still biologically young. Cnidarians, crabs, freshwater snails, amphibians and many fish, from small to medium-sized such as the common rudd, the common roach, perciforms and eels can be seen in the lake. Near the shore, the first water plants are starting to spread. The immediate surroundings of the lake are fields, trees, copses and hedges. The green belt, which is around 80-130m wide, is filled with deciduous trees, bushes, meadows and other areas that were allowed to develop naturally. External reading and references Peter Bailly, Franz Josef Holzapfel: Eschweiler entdecken. Die Wanderwege des Eifelvereins Eschweiler mit Beschreibung der heimatkundlichen Sehenswürdigkeiten. Eifelverein Eschweiler, Düren 2002, . Bezirksregierung Münster als Obere Flurbereinigungsbehörde in Zusammenarbeit mit dem Amt für Agrarordnung Euskirchen: Historischer Pfad rund um den Blausteinsee (Erinnerungen an die Orte Lürken, Laurenzberg, Langweiler, Obermerz und Langendorf). Broschüre. Leo Braun: Der Blausteinsee. Woher kommt der Name Blausteinsee? In: Schriftenreihe des Eschweiler Geschichtsvereins. Bd. 21, 2001, , S. 8–14. Adam Elsen: Geschichte der Stadt Eschweiler in Daten. (1800 bis 1993) (= Schriftenreihe des Eschweiler Geschichtsvereins. Bd. 14). Eschweiler Geschichtsverein, Eschweiler 1993. Christiane Krahn: Die bandkeramischen Siedlungen im oberen Schlangengrabental. Studien zur bandkeramischen Besiedlung der Aldenhovener Platte (= Rheinische Ausgrabungen 57). von Zabern, Mainz 2006, . External links Official website of Blausteinsee Artificial lakes of Germany Lakes of North Rhine-Westphalia