3 Best Sights in Western Paris, Paris

Maison La Roche is a must-see for architecture and design lovers. Built as a residence in 1923, it’s a stellar example of Swiss architect Le Corbusier's innovative construction techniques based on geometric forms, recherché color schemes, and a visionary use of iron and concrete. The sloping ramp that replaces the traditional staircase is one of the most eye-catching features. Hour-long English tours are available (four-person minimum) by advance booking.

It's a shame you can't go inside this house, which is considered the city's first Art Nouveau structure. Dreamed up in 1898 by Hector Guimard, the wild combination of materials and the grimacing grillwork led neighbors to call it Castle Dérangé (Deranged). Yet the project catapulted the 27-year-old Guimard into the public eye, leading to his famous métro commission. After ogling the sea-inspired front entrance, go partway down the alley to admire the inventive treatment of the traditional Parisian courtyard, complete with a melting water fountain. A few blocks up the road at No. 60 is the Hotel Mezzara, designed by Guimard in 1911 for textile designer Paul Mezzara. You can trace Guimard's evolution by walking to the subtler Agar complex at the end of the block. Tucked beside the stone entrance at the corner of Rue Jean de la Fontaine and Rue Gros is a tiny café-bar with an Art Nouveau glass front and furnishings.

The modest home of the great French 19th-century writer Honoré de Balzac (1799–1850) contains exhibits charting his tempestuous yet prolific career. Balzac penned nearly 100 novels and stories known collectively as The Human Comedy, many of them set in Paris. You can still feel his presence in his study and pay homage to his favorite coffeepot—his working hours were fueled by a tremendous consumption of the "black ink." He would escape his creditors by exiting the flat through a secret passage that led down to what is now the Musée du Vin.