Boat trip on the Seine River in Paris - Let me suggest The Vedettes du Pont Neuf!

When your feet get to tired of walking around in Paris it is great to take a boat trip on the Seine River. There are many companies that offer this from luxury ( and not so good ) dinner cruises to huge boats like Bateaux Mouche.  I personally like this small company a lot more. The company is Vedettes du Pont Neuf and their boat tours last for 1 hour. The cost is very reasonable as well. If you buy the ticket on the spot it is 14 Euro per person but if you buy on the Internet you can get the tickets from 9 Euro for adults. The boat trip start at the famous Pont Neuf and takes you through Paris all the way to the Eiffel Tower and then back around Notre Dame. On most of the boats you can sit both inside and outside. You also have a live guide that tell you what you see in both French and English. This is much more personal then the big companies boat were everyone sits with headphones to listen to the explanations.
I personally like the evening cruise at about 21.30 so you see Paris lit up.
For more info look at this homepage.
http://www.vedettesdupontneuf.com/accueil/