Winding nearly 1,800 miles through ten countries—including Germany, Austria, and Romania— the Danube is one of the world’s most iconic rivers (it’s no wonder Strauss wrote a waltz about it—The Blue Danube, 1867). The prettiest portions may well be the tributaries in Germany’s Black Forest, not to mention the exact spot where the river begins: a reflecting pool on the grounds of the Prince of Fürstenberg’s palace, in Donaueschingen, Germany.
The Colorado River
The biggest river Instagram star may well be the Colorado River—or more specifically, Horseshoe Bend, which sits north of the Grand Canyon and has more than 220,000 #horseshoebend posts. This looping flow of turquoise water cuts through the red sandstone cliffs so beautifully, you’ve got to see it to believe it. Once you’ve taken your shot from the overlook, sign up for a rafting trip with Canyon River Adventure, and keep your eyes out for ancient Native American petroglyphs.
Before Amazon, there was The Amazon—considered the largest river on earth, at more than 4,300 miles long, with waters in 8 countries (including Brazil, Ecuador and Venezuela). Originating high in the Andes, it’s perhaps best experienced by tour— Abercrombie & Kent offers Peruvian Amazon cruises that include spotting sloths and pink river dolphins. Yes, pink.