Nice is the the capital of the French Riviera (Côte d’Azur):
The Promenade des Anglais, a famous promenade along the Mediterranean
The old town (Vieux Nice)
The Colline du Chateau overlooking the Baie des Anges
Cliff Walk
Parc Phoenix, a botanical garden
Museums: Museum of Modern and Contemporary Art, Musee des Beaux-Arts, Musee Chagall, Musee Matisse, Musee et Site Archeologiques de Cimiez
Squares: Place Masséna, Place Garibaldi, Place Rossetti, Cours Saleya (daily flower market), Place du Palais
Churches: Sainte-Réparate Cathedral, Russian Orthodox Cathedral
Nice Observatory (the architect was Charles Garnier, and Gustave Eiffel designed the main dome)
Beaches