Reims

While the centre is fairly compact and easy to get around by foot, if you want to go further afield then try the buses. They're very reliable, run regularly, and despite local complaints, I think, good value at €1 to go anywhere. If you intend to use them a lot, buy a carnet of 10 tickets for €8.60 from bars, tabaco shops or newspaper shops. single tickets can be bought on the bus but make sure you have the right amount. You can also buy day tickets for €3, which is interesting if you take the bus at least 4 times during the dayReims Public transportation website

Taxis are reasonable about €2 a mile but you can't hail them and they have to be booked in advance, which can be difficult if your French isn't above conversational level.

With TGV a day trip to or from Paris is possible it takes 45 minutes. Be aware you have to book in advance, but at least you can do this in English online at SNCF.com.