NINE RIVER CITIES
I searched for nine cities situated near rivers, and then used snazzymaps to remove all streets, borders, buildings, labels from the map. Snazzymaps was a lot of fun to use, and enabled me to color the rivers with which ever color I could imagine. Shown below are the results for:
Pittsburgh, United States of America
Prague, Czech Republic
Kinshasa, Democratic Republic of the Congo
Paso Flores, Argentina
And here are the cities on a world map, color coded according to the rivers shown above.
Saint Louis, United States of America