Danube

The Danube is Europe’s second-longest river and flows through nine countries, including Austria, Slovakia, Hungary, Croatia, Serbia, Romania, Bulgaria, Moldova, and Ukraine before draining into the Black Sea. For those looking for an Eastern European adventure, the Danube is a perfecting starting point. Travelers can expect to see classic hotspots such as Nuremberg, Germany; Vienna, Austria; historic Bratislava, Slovakia; the Wachau valley in Austria; and Bucharest, Romania.

Start your journey by exploring medieval German towns before hopping on a boat to see the charming waltzes in Vienna, or explore Soviet-style architecture in Bratislava. Romania offers travelers the chance to go on wine tours, while Bulgaria is full of hidden gems.