The Danube, the longest river in Europe. The journey starts at its source in Germany in Furtwangen (where the Danube is called Breg), then continues through Austria, Hungary, Serbia and Romania to the delta. After about 3,500 km and a few days on the delta, we travelled back to Switzerland via Bulgaria, Macedonia, Albania, Montenegro, Bosnia and Herzegovina, Croatia, Slovenia, Austria and Liechtenstein. A total of over 7,500 very varied kilometres in three weeks. Often on back roads, sometimes very adventurous routes and preferably over mountains. This part of Europe has a lot to offer and it would need more time to discovered it properly. We were positively surprised by the nature and the people. A trip recommended to every adventurer.