I'll give you one piece of friendly advice; Don't wander off the beaten track too much if you're going to be on your own in Paris.
I've been in Paris once for 2 days with a polish pigrimage ;) We were residing in the cheapest hotel ( called Formula 1 ) in a really bad district - all panel buildings there had their base floor burnt and burnt car wrecks laying everywhere.. I haven't seen much of Paris then because I was small and we were mostly sitting in Churches ;) This time I've got accomodation in one of the centre zones, near all the sightseeing places so I'm focusing on the centre really...
Thanks for the advice though :)
Japanese style gardens at the UNESCO headquarters
this sounds really nice, have to add it to my map and thanks for the link.