hello. We are 20 persons in a group. We will travel from CDG to the centre of paris. 5 hours later we will travel back to the airport- that means we have just one afternoon in paris. We want to go to the Eiffel tower. . I am wondering if we can buy a day ticket at the airport that also includes the metro (we need to change to the metro to go to the Eifel tower)? I am also wondering: Are we able to use our visa-card at the ticket windows ?

Greetings from mari Engeland