OK ... a basic, newbie question . . .
Are the Metro tickets one buys in a carnet valid for travel in Zones 1 & 2 ... or just Zone 1 (Paris) ... ?
If just Zone 1, what's the best way to travel into (and back from) Zone 2? We are staying in the Marais and have one trip into Zone 2 planned on the Metro - the Port Vanves flea market.
Advice, pls.