Oh Lyon! You were a true treat, and really amazing to be in.
It is the third largest city in France, after Paris and Marseille. It is located in the east of the country, a little south from the centre. What's important is the geography. Two rivers Rhone and Saone flow and meet there, Lyon grew on their junction. Not so far on the east from the city the mountain range of the Alps start to tower over the land. They are not really visible in the city itself, but the terrain is rather filled with hills anyway. The region of France in which it lies is called Auvergne-Rhône-Alpes.