Fodor's Expert Review Pavillon de l'Arsenal

If your knowledge of Paris history is nul (nil), stop here for an entertaining free tutorial. Built in 1879 as a private museum, the Pavillon today is a restored structure of glass and iron that showcases the city's urban development through the ages. A giant model of Paris traces its evolution (with information in English). There are photos, maps, and videos, plus a giant digital interactive model detailing what Paris is predicted to look like in the future. Reconstruction plans—called Grand Paris—are vast and will extend to the 2024 Olympics and beyond. The Pavillon also has a café-bookstore and hosts frequent architecture-themed temporary exhibits.