| River through Interlaken | 24 |
| River through Indiana | 21 |
| River through Idaho | 19 |
| River through Hesse, Germany | 28 |
| River through Hesse | 19 |
| River through Hamburg | 21 |
| River through Hades | 19 |
| River through Grenoble | 22 |
| River through Glasgow | 21 |
| River through Germany | 21 |
| River through Frankfurt | 23 |
| River through France and Belgium | 32 |
| River through France | 20 |
| River through four world capitals | 33 |
| River through Florence | 22 |
| River through Flanders | 22 |
| River through Firenze | 21 |
| River through Fargo or Hanoi | 28 |
| River through Egypt | 19 |
| River through Dresden | 21 |
| River through Devon | 19 |
| River through Deutschland | 25 |
| River through Cologne | 21 |
| River through central Germany | 29 |
| River through central Africa | 28 |
| River through Catalonia | 23 |
| River through Castile and León | 33 |
| River through Carlsbad | 22 |
| River through Cairo | 19 |
| River through Budapest | 22 |
| River through British Columbia | 30 |
| River through Bismarck | 22 |
| River through Berne | 19 |
| River through Bern | 18 |
| River through Berlin | 20 |
| River through Belgium | 21 |
| River through Beijing | 21 |
| River through Bavaria | 21 |
| River through Battenberg, Germany | 33 |
| River through Avignon | 21 |
| River through Atyrau, Kazakhstan | 32 |
| River through Arles | 19 |
| River through Aragon | 20 |
| River through Ann Arbor | 23 |
| River through Alaska | 20 |
| River the Aswan Dam dams | 24 |
| River that's the site of Javert's demise in "Les Misérables" | 81 |
| River that's more than 4,000 miles long | 43 |
| River that was the scene of WWI fighting | 40 |
| River that was the ancient dividing line between Rome and Carthage | 66 |
| River that was notably crossed on Christmas 1776 | 48 |
| River that turns west at Orsk | 29 |
| River that the Ilek joins in Kazakhstan | 39 |
| River that the dead drank from, in myth | 39 |
| River that the Burma Railway crosses | 36 |
| River that starts in the Swiss Alps | 35 |
| River that starts in the Graian Alps | 36 |
| River that starts at the Vioménil | 36 |
| River that starts at Pittsburgh | 31 |
| River that sounds muddy | 23 |
| River that sounds like a horse | 30 |
| River that Sherlock Holmes fell into | 36 |
| River that runs through York | 28 |
| River that runs near the Louvre | 31 |
| River that runs near the Leaning Tower of Pisa | 46 |
| River that runs by the Uffizi | 29 |
| River that runs by 11 of the 20 largest cities in Russia | 56 |
| River that rises in the Vogesen Mountains | 41 |
| River that rises in the Bernese Alps | 36 |
| River that rises in the Ardennes | 32 |
| River that rises in the Apennines | 33 |
| River that rises in Monte Falterona | 35 |
| River that rises in Lake Tana | 29 |
| River that rises in Cantabria | 29 |
| River that passes through Essen, Germany | 40 |
| River that passes by the Hermitage | 34 |
| River that passes by Essen, Germany | 35 |
| River that once formed the western border of the Holy Roman Empire | 66 |
| River that named Iberia | 23 |
| River that meets the Thames at London | 37 |
| River that lends its name to an Austrian city | 45 |
| River that Kazakhs call Zhayyq | 30 |
| River that joins the Severn | 27 |
| River that joins the Seine | 26 |
| River that joins the Neisse | 27 |
| River that joins the Mississippi | 32 |
| River that joins the Fulda | 26 |
| River that goes from calm to choppy? | 36 |
| River that forms the Livingstone Falls | 38 |
| River that forms part of Colombia's border | 46 |
| River that forms Lake of the Ozarks | 35 |
| River that forms at Pittsburgh | 30 |
| River that flows to the Caspian Sea | 35 |
| River that flows through ten countries | 38 |
| River that flows through nine countries | 39 |
| River that flows through Florence | 33 |
| River that flows past Omaha | 27 |
| River that flows past more than 40 castles | 42 |
| River that flows past four universities | 39 |
| River that flows into the Seine | 31 |