Economy of Hungary and the Tisza. The Danube also flows through parts of Germany, Austria, Slovakia, Serbia, and Romania. It is navigable within Hungary for 418 km. The Tisza River is navigable for 444 km in the country. Hungary has three major lakes. Lake Balaton, the largest, is 78 km long and from 3 to 14 km wide, with an area of 592 km. Lake Balaton is Central Europe's largest lake and a prosperous tourist spot and recreation area. Its shallow waters offer summer bathing and during the winter its frozen surface provides facilities for winter sports. Smaller bodies of water include Lake
Lake Constance St. Gallen, and Schaffhausen. The Rhine flows into the lake from the south, with its original course forming the Austro-Swiss border, and has its outflow on the "Lower Lake" where — except for Schaffhausen — it forms the German-Swiss border until the city of Basel. Lake Constance is the third largest freshwater lake in Central and Western Europe in terms of surface area (and the second largest in terms of volume), after Lake Geneva and (in terms of surface area) Lake Balaton. It is long, and at its widest point, nearly wide. It covers approximately , and is above sea