Cité de l'Architecture et du Patrimoine

If you are even slightly interested in architecture and design you cannot miss this place. Dedicated to both historic and contemporary architecture, among its varied displays downstairs are detailed plaster models of the greatest French cathedrals, and upstairs, a fully furnished apartment literally pulled out of one of Le Corbusier’s Unité d'Habitation. There's also a café with an incredible view over the Eiffel Tower AND a world class design and architecture bookshop - Librarie du Moniteur. Yep, pretty cool.