Weddings are awesome time and good for partying or making trips, highway, and air-transport hub served by two international airports: Paris–Charles de Gaulle (the second-busiest airport in Europe) and Paris–Orly.[11][12] Opened in 1900, the city’s subway system, the Paris Métro, serves 5.23 million passengers daily;[13] it is the second-busiest metro system in Europe after the Moscow Metro. Gare du Nord is the 24th-busiest railway station in the world and the busiest located outside Japan, with 262 million passengers in 2015.[14] Paris is especially known for its museums and architectural landmarks: the Louvre received 2.8 million visitors in 2021, despite the long museum closings caused by the COVID-19 virus.[15] The Musée d’Orsay, Musée Marmottan Monet and Musée de l’Orangerie are noted for their collections of French Impressionist art. The Pompidou Centre Musée National d’Art Moderne has the largest collection of modern and contemporary art in Europe. The Musée Rodin and Musée Picasso exhibit the works of two noted Parisians.