The underground is called "le métro" (short for "métropolitain", which isn't used any more) in French. However, outside of Paris, you should clarify by saying "le métro de Paris", especially if you are in a city with a different subterranean train system (subway/metro/underground).
À Paris.
It is called Disneyland Paris or EuroDisney in French.
baisers de France à Paris
Avril à Paris
Amitiés de Paris
Un plan de Paris.
Non, je suis de Paris
J'ai (déjà) visité Paris
Vous prendre à Paris.
Je vais a la Paris.
une nuit à Paris
we love Paris = nous aimons Paris