The Rhine River: Fairy-tale castles, picturesque towns (like Germany's Bacharach, above), and a Black Forest setting straight out of the Brothers Grimm.
The Elbe River: Rugged cliffs and sandstone formations, flecked with baroque cities and wine villages.
The Elbe River: The fortress Königstein in Saxony.
(Maria Teresa Weinmann/Dreamstime.com)
The Volga River: Multicolored, onion-dome cathedrals (like this temple in the city of Uglich) and ornate palaces fit for a czar.
The Volga River: A flooded bell tower in Kalyazin, Russia.
The Dnieper River: Tranquil Ukrainian countryside, dotted with birch and pine forests, that gives way to the elegant gold domes of Kiev (above).
The Danube River: Stretching from the BlackForest to the Black Sea, it's the grande dame of rivers, seen here at the Iron Gates gorge between Romania and Serbia.
(Courtesy Cornelius Bechtler/Wikimedia Commons)
The Danube River: The Chain Bridge in the Hungarian capital of Budapest.
The Rhone River: Food lovers’ territory, through the wine regions of Burgundy, the lavender fields of Provence, and the culinary capital of Lyon.
The Rhone River: Lavender fields and vineyards in France's Rhone-Alpes region.
The Douro River: The terraced vineyards of the world's oldest demarcated wine country (above), where Portugal's sweet, sticky port is made.
The Douro River: Port wine vineyards in Portugal's Douro region.
(António Jorge Da Silva Nunes/Dreamstime.com)
The Seine River: The City of Light (above, as viewed from the Eiffel Tower) and the serene Normandy landscapes that inspired Monet.