One of the best things we did on the trip was take one of the river tours on the Seine. This is about as touristy as it gets, but seeing Paris from the water at night was incredibly dramatic and overwhelming. We started our tour a little before 10 just when it was getting dark. It didn't hurt that we were on there with about 300 other people who were really excited by the experience as well. It had a weird field trip/rock concert feel to it. Turning one bend and seeing the lit up Notre Dame for the first time really socked us in the gut. There was a very heartfelt and synchronized "whooooa..." everyone let out at the same moment.
This is the Pont Neuf, the oldest standing bridge in Paris. Each bridge along the way is unique and they use just about every architectural style in the book since they were constructed at different times. This bridge features 384 different heads sculpted along the sides of it. As far as I can tell each head is different.
Here is a view from Pont de la Concorde. You can see the Pont Alexandre III straight ahead. Alexandre III was the most elaborate bridge we saw. It featured lots of sculptures and ornate lamps along it. The Eiffel Tower is of course beaming on the left.