The following links are very interesting and give all the information:
Find out about the fares and the route network. I recommend the ticket “Paris Visite” for 1, 2, 3, or 5 days. Do not forget to benefit from the partners of the RATP. It is the best way to discover Paris.
The French site is the most comprehensive. It is worth knowing that
- many stations are beautifully designed
- summer voyages in open wagons are offered
- the musicians in the connecting corridors are usually very talented
- small stations are not accessible for handicaped people
When you buy your ticket “Paris Visite”, you may also use the buses in the metropolitan area. They are often appropriate to discover Paris. They are slow and you can see the beautiful town.