4 Best Sights in Western Paris, Paris

This underrated museum has the largest collection of Monet's work anywhere. More than 100 pieces, donated by his son Michel, occupy a specially built basement gallery in an elegant 19th-century mansion, which was once the hunting lodge of the duke de Valmy. You can find such works as the Cathédrale de Rouen series (1892–96) and Impression: Soleil Levant (Impression: Sunrise), 1872, the painting that helped give the Impressionist movement its name. Other exhibits include letters exchanged by Impressionist painters Berthe Morisot and Mary Cassatt. Upstairs, the mansion still feels like a graciously decorated residence. Empire furnishings fill the salons overlooking the Jardin du Ranelagh on one side and the private yard on the other. There's also a captivating room of illuminated medieval manuscripts. To best understand the collection's context, pick up an English-language audio guide (€4) on your way in.

When Parisians want to experience the great outdoors without going too far from home, they head to the Bois de Boulogne. Once a royal hunting ground, the Bois is like a vast tamed forest where romantic lakes and wooded paths are complemented by formal gardens and family-friendly amusements. On nice days, it’s filled with cyclists, rowers, rollerbladers, and joggers. Art lovers also flock here thanks to the Fondation Louis Vuitton, a stunning exhibition space dedicated to contemporary art.

The Parc de Bagatelle is a floral garden with irises, roses, tulips, water lilies, and roaming peacocks, while the Pré Catelan contains one of Paris's largest trees: a copper beech more than 200 years old. Romantic Le Pré Catelan restaurant (three Michelin stars), a Belle Époque classic with an elegant terrace, still draws diners and wedding parties. The Jardin Shakespeare inside the Pré Catelan has a sampling of the flowers, herbs, and trees mentioned in Shakespeare's plays, and it becomes an open-air theater for the bard's works in spring and summer. The Jardin d'Acclimatation is an amusement park that attracts hordes of preschoolers on summer Sundays. Boats or bikes can be rented for a few euros at Lac Inférieur. You can row or take a quick "ferry" to the island restaurant, Le Chalet des Îles. Two popular horse-racing tracks are also in the park: the Hippodrome de Longchamp and the Hippodrome d'Auteuil. Fans of the French Open can visit its home base, Stade Roland-Garros.

The main entrance to the Bois is off Avenue Foch near the Porte Dauphine métro stop on Line 2; it is best for accessing the Pré Catelan and Jardin Shakespeare, both off Route de la Grande-Cascade by the lake. For the Jardin d'Acclimatation and the Fondation Louis Vuitton, off Boulevard des Sablons, take Line 1 to Les Sablons or Porte Maillot, where you can walk or ride the Petit Train to the amusement park, which is next door to the foundation. The foundation also offers a €2 return-trip shuttle from Place de l'Étoile. The Parc de Bagatelle, off Route de Sèvres-à-Neuilly, can be accessed from either Porte Dauphine or Porte Maillot, though it's a bit of a hike. You'll want to leave the park by dusk, as the Bois—potentially dangerous after dark—turns into a distinctly “adult” playground.

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.

Rising up out of the Bois de Boulogne like a magnificent ship sporting billowing crystal sails, Frank Gehry’s contemporary-art museum and cultural center is the most captivating addition to the Parisian skyline since the unveiling of the Centre Pompidou in 1977. Commissioned by Bernard Arnault (chairman and CEO of luxury-goods conglomerate LVMH), the museum, which opened in 2014, houses Arnault’s substantial private collection, including pieces by Pierre Huyghe, Gerhard Richter, Thomas Schütte, Ellsworth Kelly, Bertrand Lavier, Taryn Simon, Sarah Morris, and Christian Boltanski, among others. La Fondation Louis Vuitton also hosts extensive temporary exhibitions, like the mesmerizing light installations of Danish-Icelandic artist Olafur Eliasson. Le Frank, the pricey on-site restaurant overseen by Michelin-starred chef Jean-Louis Nomicos, is noted for its sophisticated mix of French and international cuisine. The museum is a 12-minute walk from Les Sablons métro on Line 1; alternatively, you can catch the Fondation shuttle (€2 for a return ticket), which leaves every 10–15 minutes from Avenue de Friedland at Place de l’Étoile.