'le métro' is a network of underground railway stations in Paris and the neighbouring towns. You can go anywhere in Paris with it.
le metropolitain - called le metro in common language
The le metro is the French underground/ subway train network system. Its centre is Paris and it links the surrounding areas.
You can't go on the metro, you have to go on the RER (google it). From the centre of Paris it takes about 35 minutes.
Chemin de Fer Métropolitain de la Ville de Paris. But everybody calls it Le MÉTRO.
'le métro' is the name for the underground / subway transportation in Paris.
yes
The RER is a Paris suburban train service. It does not go to Le Havre. You can go from CdG to Gare du Nord on the RER, from Gare du Nord to Gare Saint-Lazare on the metro, and from Saint-Lazare to Le Havre by train. The SNCF website will help you with this.
The metro is a very sophisticated subway system used in Paris.
Fulgence Bienvenüe, a French civil engineer, and Edmond Huet, a engineer and director of the Paris civil works, coauthored the project of the Parisian métro. (links)
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).
Firstly, note that Paris is 200 miles from the sea. Secondly, note that Le Touquet (on the channel coast) is also known as Paris-Plage (Paris beach) However, for the past 10 years or so Paris has had artificialsummer beaches in several places; on Voie Georges Pompidou along the Seine )Metro Pont-Neuf), at La Villette (Metro jaurès) and in Place de l'Hotel de Ville. (Metro Hôtel de Ville). Have a look at http://www.paris.fr/english/visit/highlights/paris-plages/rub_8208_stand_34146_port_18969 for more detail.
Le Catacombes De Paris, of course.