Rush Hour 3 was filmed in Paris, France.
Hôtel Plaza Athénée
In movie
Scene where The hotel Lee and Carter stay in.
Real
Trocadéro Gardens - The Fountain of Warsaw
In movie
Scene where Carter and Lee have to escape their pursuers by jumping off the Eiffel Tower. They end up in the pond of Trocadéro Gardens at the foot of the Eiffel Tower.