Writer Taras Grescoe discovers "the art of being authentically Parisian—the art, that is, of tasting, touching, buying, and eating with an extra touch of finesse" in the March 2008 issue of National Geographic Traveler. And even though traipsing around pricey Paris might sound like serious damage to your wallet, not to mention your holiday joie de vivre, that's only if you don't know where to look (and when to go). Indulge in some of the City of Light's sweetest luxuries—gratuit—from hidden nooks of authenticity to world-class museums and sights.