When I went to Sacre Coure I walked thru Montmartre (a famous place where you can find a lot of art painters) one painter came where a was standing and he began to paint my self. The painting was great but very expensive. In that moment I didn't ask for an offer and I paid arround US$50 dlls. for it. PLEASE, don't let you get paint if you don't want to pay that amount or if you can't ask for an offer.
There are not many places worth not visiting in Paris, but the closest there is is Montmarte. It is a truly unpleasant place. I would stay away, but if you are still curious, I would go out to Pere Lachaise and hit Montmarte briefly after that. But Pere Lachaise cemetary deserves much more time than Montmarte.
Also, I consider the Champs-Elysees a big tourist trap. That doesn't mean you shouldn't walk up it, of course you should, and see the arc de triomphe, but it does mean that it is Americanized and rather disappointing. However, what is on either end of it is worth the mile of Planet Hollywood's and Gaps that you have to walk past.
Place du Tetre in Montmarte is exciting and annoying (for both inhabitants and tourists). If you make eye contact with someone up there they'll start drawing your self portrait, which will cost you approx 80euro. Some are quite good, but the ones with portable workshops are awful. If you have long hair, they'll practically grab your hair and start braiding it with rope. The tourists love it apparently, but I would recommend not talking to anyone unless you can spend 100euro on a drawing or feel like being badgered on your vacation.
Montmartre! The place is just full of tourists, the restaurants are over-priced and with snotty waiters, it is miles away from anywhere else and the famous city view from Sacre Coeur is no better than from the roof cafe at the Samaritaine department store. Besides, the place is littered with pick-pockets and around the corner are some not so nice areas after dark.
To me, Montmartre has always been a kind of tourist trap: it definitely isn't what it used to be - an artists' place! Now it is a shopping area for overprized souvenirs... So, if your time is limited, I'd suggest to leave this place out!
Personally, I was not that enthralled with PERE LACHAISE or SACRE COEUR. I'm sure there are many whom would argue, but it's just my opinion. Pere Lachaise is a famous cemetary, having famous people like Door's Jim Morrison calling it home. (There are many non-French buried here.) If you have the time and the desire to locate your favorite dead celebrity, go here. SACRE COEUR - this too is another tourist haven, however I don't see why. The view was decent, but nothing as spectacular (nor as clean) as the one from the Eiffel Tower. If you don't have time to visit it, don't feel too bad.
Montremartre - in the hey-days it used to be a popular hangout for artists of any kind. These days, however, those people selling paintings in the little square are not worth being called artists at all. Also note the souvenir shops: the ugliest among the ugly. It's behind the Sacre-Coeur: gladly give it a miss.
Place de Tertre is a very nice place of fun to visit. But also there are so many visitors there always. Do take care of your money, handbag and babies there. If you want to have a draw, do bargin first.
Be careful in the Montmartre area. While taking my nine-year-old niece into a bar to use the bathroom, we saw a drug deal going down. Use intelligence and caution.
If you want a portrait from the many artist at Sacre Coeur, negotiate the price first. One of them tried to charge me 100 dollars for a chalk charicature!
While visiting the Sacre Coeur,there are about a million different people waiting to draw your portrait..my advice-check out all the artists' work,and settle on a price which is normally between 100-200francs..me on the other hand,let go of a lot of cash!!
It was a steep walk up the hill to Sacre Coeur, but well worth it. Especially on a nice day like we had.
Unique Suggestions: pay the one metro ticket to take the huge escalator (moving stairs)
You can't avoid the crowds at Sacre Coeur - but it is such a marvellos place and a wonderful view from its lofty setting.