I WILL TRAVEL ACROSS THE LAND SEARCHING FAR AND WIDE
Oh, you're in Paris?
A quick highlights of good parks and areas:
Trocadero (the other side of the Seine, from the Eiffel Tower) has a large variety of all kind of uncommon and one rare spot, but no special notable nest.
The Luxembourg (you were there) had lots of Exeggcute last week, it's supposed to be Cubone central now.
Ile de la Cité/Notre Dame/ile St. Louis area is shockful of water spots, so you tend to get lucky with the rare Dratinis. Shouldn't have rotated. Pikachu was holed in the gardens behind Notre Dame; came out like clockwork. Or Qasimodo, your pick.
Further north, you have Parc des Buttes Chaumond, lots of Vulpix. Plus it's nice to visit.
Then NE corner of Paris, the Parc de la Vilette which is currenly Kabuto central, plus it has two Rare pokemon spawns to the west border (north and middle) on the canals. If you see a rare Pokemon on tracker, it's one of those two. Pretty much any 10km egg pokemon spawns there.
Then, well, pretty much any park and spots.