One of the best lakes to dive in Germany is the "Bodensee" in southern Germany. The Bodensee, some 80 km long is bordered by Germany, Switzerland, and Austria (hey, that's Austria, not Australia !:)). One spot popular with divers is in the german town of Ueberlingen: deep, dark, cold and clear...vertical wall all the way dwon to 400 ft.
Facts about Lakes
It is in Germany- The typical depth is 0-20 Metres 0-60 Feet.
- The typical visibility is 10-30 Metres 30-100 Feet.