The Danube, the longest river in Europe. The trip starts at the source in Germany in Furtwangen (where the Danube is still called Breg), then 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 diverse kilometres in about three weeks. Often on side roads, sometimes very adventurous routes and preferably over mountains. This part of Europe has a lot to offer and it would actually take more time to properly discover. We were very positive surprised about the nature and the people along the road. A journey we can highly recommend to any adventurer.