The Danube basin in Europe extends almost 3,000 km from the Black Forest in Germany, through the Alps in Austria to the Danube Delta and the Black Sea coast of Romania. Covering over 800,000 km², this region of Europe is the land surrounding the Danube River, its tributaries and flood plains.
Dominated and both divided and united by the Danube River, the second longest river in Europe, the surrounding lands that form the Danube basin are steeped in history, with evidence that parts of it have been settled since the 5th millennium B.C.
The new cycling route EuroVelo 6  which runs from the Atlantic Ocean to the Black Sea, follows the Danube river from Passau, Germany to its estuary on the Black Sea, in Romania. EuroVelo 6 includes the Donauradweg, which stretches from Passau in Germany to Austria's capital Vienna and continues on to Bratislava in Slovakia. The route then continues on to Hungary, Serbia, Bulgaria and Romania. On the EuroVelo 6 web site, you will find a useful forum and some news about Eurovelo 6.