Bavaria is connected to Hungary through a bicycle path, as well as Budapest to Serbia.
EuroVelo 6 (EV6), named the "Rivers Route", is a EuroVelo long-distance cycling route that runs along 3,653 km (2,270 mi) some of Europe's major rivers, including much of the Loire, some of the Saone, a short section of the upper Rhine and almost the entire length of Europe's second longest river, the Danube  from the Atlantic coast of France to the city of Constanta on the Black Sea. In this section it passes through Hungary, Serbia, Bulgaria (where it passes the UNESCO Heritage site Srebarna Nature Reserve) then into Romania to the UNESCO Heritage site of the Danube Delta, before following the Black Sea coast to end at Constanta in Romania. 
