Pierre Valade: view from the top of the museum is one of my favorite! there is also a nice restaurant there. if you enjoy modern art and architecture (you do, right?), then you'll love this place.
Holger Lüdorf: This is where the Parisians go on a beautiful day. Bring a picknick and have it on one of the lawns with students from Sorbonne and other locals.
ParisianGeek: Remplaçant l'immeuble ESSO, Cœur Défense est composé de deux tours jumelles de 161 m (40 étages), et de 3 tours de 8 étages. Son architecture massive en fait un des icônes du quartier.