I love that you can look out through the giant clock at the Musée d'Orsay and see Montmartre (although it was a bit of a hazy view on this particular day).
Which reminds me: it's been ages since I've been to the Orsay; last time I was there, they were still in the middle of some renovations and parts of the museum were closed off. I couldn't even find the polar bear statue, which is one of my favorites. I think I need to go there again, and soon... to see if he's back yet.
Or maybe he's hanging out at the North Pole with Santa.