Well, i hope for your sake the Eiffeltower isn't shut for whatever reason. I've been to Paris a couple of times myself, and every time the damn thing was shut. They must have been on the lookout or something..... THERE HE COMES.... CLOSE IT DOWN, QUICK !
And should you be wandering through the gardens of the Palace of Versailles, mind your steps. I've been there myself once, when i got ambushed by a call of nature. Of course there wasn't a restroom anywhere near. You fill in the rest.