Well I'm in Paris with Mike and his Dad. It may be touristy, but you can't miss the Eiffel Tower. We had some great weather considering the time of year (late December) and La Tour Eiffel was spectacular! It is a huge structure with tremendous views from the top.
You can see the Tower from almost everywhere in Paris, and can't miss it at night when they light it up with sparkly flashing lights - it's gorgeous.