"The Centre Pompidou, France 's national museum of modern art, led the way for steel-and-glass buildings in the 1970s. Now the museumleads the way in modern art with its extraordinary collection, currently the world's second largest. Masterpieces include Pablo Picasso's Parade and—one of my favorites—Tamara de Lempicka’s YoungGirl in Green . Gofor the museum, butcheckout thepublic library and the view of Paris that becomes more and more impressiveas the museum's escalators rise fromfloor to floor. Spot the Eiffel Tower and Sacré-Coeur (and perhaps a street entertainer or two with agawking audience of kids) from the sprawling roof terrace."