A gallo-roman semi-underground gallery (a former storage unit from the 3th century), the cryptoportique may seem an interesting place to visit, especially when an exhibition inside is advertised, but ...
it's so dark inside that you can't see anything (you can barely see your feet and progress following the walls, no guided visit available).
Address : place du Forum
Unique Suggestions: Well, that's just a waste of time (the entrance is free).
Be aware of buying Champagne in one of the wineries. They take advantage of your excitement from their tour and overcharge you for the Champagne. I carried two heavy bottles, in the rain on the train, all the way back to Paris, only to find out I could have bought the same bottles at half the price in the little wine shop across the street from my hotel.
This is the real trap one you are hooked to the taste it is difficult to come off.
We had a great time in the champagne house