11. Along the Blue Danube
The second longest river in Europe, Danube, reaches its widest point in Serbia, where it also forms the longest gorge on the continent - Đerdap. Along its banks is where some of the earliest civilizations settled. Travel along the banks of Danube River and marvel at stunning landmarks like Smederevo and Golubac Fortress. Visit Viminacium, an untouched Roman settlement and Lepenski Vir, the oldest urban settlement in Europe dating back to 7000BC. Coupling history with inspirational landscapes, this is a wonderful day along the beautiful Danube.