I had heard this saying before but hearing on the metro from an old lady really made me realize it's importance.
"There are three rivers that flow through Lyon: The Rhône, the Saône, and the Beaujolais."
Now let me explain. The French are very proud of their wine. In the Rhône-Alps region very close to Lyon, there is a winery called Beaujolais that makes delicious red wine. This wine is very popular in Lyon, so the Lyonnais people and those from this region are proud that their land produces such great wine. The Rhône and the Saône do run through Lyon but the Beaujolais "river" in Lyon can only be found in bottles.