Snaking almost 1,800 miles from its source in Germany’s Black Forest to the Black Sea in Romania, the Danube is best explored slowly. Cruises, the most popular option, provide up-close encounters with ...

Set on a cliff overlooking the River Guadiana, the small town of Mértola in Portugal seems frozen in time, a silent witness ...

Stefan Wermuth / Reuters / Landov The Thames has been synonymous with rowing for almost three centuries. In August 1715, half a dozen “watermen”—oarsmen who ferried passengers on the river ...