I think The Eiffel Tower should be in Civ 4, but not in the way it was in Civ2.
I suggest th Eiffel Tower boosts the Luxury in some way (greater effet than marketplace), and also it should bring tourism very quickly, quiker than other wonders.
In real world it's a relativly young wonder (115 years old) compared to the Great Wall in China or the Pyramids, but it's the most visited site in the world. (Japanese are particuliary fond of it).
Also Paris is world known for Luxury products...
Maybe should this wonder create a new Luxury ressource that's unavailable before, such as perfumes or high-quality clothes ?
I also miss the Statue of Liberty in Civ3. It should be back in Civ4.
I can suggest two effects possible for this wonder :
- Worker Fountain : Produces a worker of random nationality every turn. Also the owner of this wonder can merge a foreign worker so than it integrates automatically.
In real world, this wonder is the symbol of immigration in America. New York is probably the city that brought the most immigrants in the world history...
- Gift Wonder : Upon completion of this wonder, you give it to another civilization, and it greatly improves your reputation toward this civilisation and also a little toward other civilizations. After that it only brings tourism in the city where it is welcomed.
Again I refer to real world : IRW, miss liberty was built in France, and given as a gift to the people of America.