Recognized as the longest river in France, the navigable Loire begins in the foothills of the Massif Central, then flows north and west across the heartland of France, finally ending in the Bay of Biscay. It's (634 miles) (1,020 km) in length.
Rising in the rugged mountains of the eastern Czech Republic, it flows west and north through south-central Poland, eventually emptying into the Baltic Sea. It's (567 miles) (912 km) in length.
Italy's longest river begins in the upper reaches of the Alps, flowing west to east across northern Italy, ending in the Adriatic Sea. It's (405 miles) (652 km) in length.
Forming in the mountains of southeastern Switzerland, this legendary river flows west, forming Switzerland's northeastern border with Germany, then runs directly north through western Germany forming part of that country's border with France, then finally dissecting the Netherlands and ending in the North Sea.
Numerous tributaries and branches run in all directions, and in overall length is (820 miles) (1,319 km).