I will be taking my first trip to Paris at the beginning of April for 9 days. We have a tentative Itinerary. We will be spending the bulk of the time within Paris, but also, would like to take a trip to Brussles for a day and Avignon for another day. I'm not sure what is best and cheapest way to get to these places and travel within Paris. Should I get a weekly metro pass to travel within Paris and also tickets for the EuroStar? Or will the Eurail (Regional Pass) be the best and allow me to do all the activities? Or is another way?
Thank you in advance for your help!!