2 Best Sights in Challiot and Ternes, Paris

The city's Museum of Fashion occupies a suitably fashionable mansion—the 19th-century residence of Maria Brignole-Sale, Duchess of Galliera. Inside, exhibition spaces on two floors focus on costume and clothing design. Covering key moments in fashion history and showcasing legendary French designers, the museum's collection includes 200,000 articles of clothing and accessories that run the gamut from basic streetwear to haute couture. Galleries at the garden level focus on fashion history from the 18th century to the present via pieces from the permanent collection. Information about changing exhibitions is on the website. Don't miss the lovely 19th-century garden that encircles the palace, a favorite spot for neighborhood Parisians to take a coffee and a book.

As elegant and stylish as the master couturier's groundbreaking designs, this museum is housed in the very mansion where Yves Saint Laurent did his work and entertained celebrity clients. More than 50 prototypes—including such landmarks as the Mondrian dress, the original pantsuit, and the woman's tuxedo—are on display at any one time, as are dozens of design drawings and a glittering array of jewelry. Thanks to its huge windows, the light-bathed upstairs atelier, stuffed with books and fabrics, offers an intimate glimpse into YSL's world. Be sure not to miss the touching short film detailing the relationship between Saint Laurent and his longtime partner Pierre Bergé. All of the exhibits have detailed English labeling, and a free English guide is available at reception.