A Random Afternoon in Paris?

Here's a question for you: What would you do with a random afternoon in Paris? Because that, my friends, is the question I need answered today...or tomorrow (depending on your timezone) Early Wednesday morning, I'm hopping on the Eurostar and heading to Paris for some work meetings...but Ive got the afternoon & early evening free. I'll get to spend some time with a super cool and amazing friend...I'm hoping that the combination of her amazing faith & foxy style sat amongst the gorgeous autumn weather and the charming Parisian streets will be a good pick-me-up. {Ye olde Aspiring Kennedy has had better years!} But forget about the years...let's just take one day at a time. And the particular day we need to focus on right now is in Paris, France! I've got a rough draft in my mind of how to fill the time, but I'm curious to hear  what you would do if you could spend an afternoon in the lovely city of Paris. And yes, of course, I'll be happy to eat a pastry for you. And a Croque Madame. And a crepe.Because I'm just a nice person like that. 

{PS. I think I'm going to have to make a pharmacy run for some Bioderm. Who wants a bottle?}