Hi, I will be visiting the Eiffel Tower, Arc de Triomphe, and Notre Dame. I have a ride that will drop me off at the Eiffel tower, but from there I want to take the Metro to the other locations and back. This is all in Zone 1 if I am not mistaken. The Mobilis ticket seems cheaper and supposedly I can purchase it at the Metro that same day? Or I can get the Paris Visite when I arrive at CDG the day before, but it's more expensive. Is the Mobilis an ok way to go? Is it easy to purchase and find?
Thanks.