Sabbia Rosa is a discreet, boudoirlike boutique you could easily walk straight past. It is, however, one of the world's finest lingerie stores and the place where actresses Catherine Deneuve and Isabelle Adjani (and others who might not want to reveal their errand) buy superb French silks. Look for the slips with inset lace. Métro: St-Germain-des-Prés.