Finland, this is the country of sauna. The best way to discover sauna is to go to a cottage weekend in a small wood house near one of the 188000 lakes and have a swim in the frozen water.
La Défense is a modern Business center. La Grande Arche, l'Arc de Triomphe, les Champs-Elysées la Concorde, le Carouselle du Louvre and the pyramide du Louvre are important monuments in the same alignement for an impressive view...
Ok, maybe it is not original but the first post is the Eiffel Tower. This monument has been built in 1889 and is one of the most impressive monument of Paris with 325 meters. From the 3 stages you can discover Paris, one of the most beautiful city of the world ;)