National Geographic: Cruising the Danube

"It’s no secret that the Danube isn’t blue, despite the name of Johann Strauss’ popular waltz. (It’s more of a murky gray.) Still, there is a fascination and draw to the mighty river that has been the heartbeat of central Europe for centuries. River cruising is one of the fastest-growing sectors of the travel industry, and drifting through the tiny towns and villages of HungaryAustria, and Germany is a dream trip for many."

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