evidence: Lake Constance is the third largest lake in Central Europe, and sits at the point where Austria, Switzerland, and Germany intersect. It’s a scenic bulge in the Rhine River popular with tourists for its castles, boating, bike trails, and Alpine scenery. Locals call it by the old German name, "Bodensee," but in most other European languages, it’s named for the city of Konstanz, on its western shore. [...] If Austria is right and all three nations control every inch of Lake Constance jointly, this kind of arrangement would be called a "condominium," and there are only a few others like it in the world. Most are waterways shared by all the nations that border them: the Moselle, Sauer and Our rivers between Germany and Luxembourg; the Gulf of Fonseca between El Salvador, Honduras, and Nicaragua; and the Itaipu Reservoir between Brazil and Paraguay. But ownership of Lake Constance will remain a mystery, at least until some brave soul decides to do some watery crimes in the middle of the lake, just to find out where he’d get prosecuted.