Galeries Lafayette

Sprawling across several buildings (don't miss its home department, which offers a trove of excellent gifts like enamel-handled cheese knives and beautiful china), Galeries Lafayette is a bit like navigating Macy's at Christmas. It is overrun with people, but for good reason: Amost every French label is represented, from Yves Saint Laurent and Louis Vuitton to Isabel Marant and Sandro, and the store offers tourists an extra 10 percent off everything.
40 Blvd. Haussmann, 33-1-4282-3456, galerieslafayette.com