Paris rewards a short visit if you prioritize ruthlessly. The Arc de Triomphe lies on the historic axis; the Eiffel Tower overlooks the Trocadéro–École Militaire axis and remain the fastest way to feel its scale, while the Musee du Louvre delivers centuries of art in a single stop few other museums can match. Add Sainte-Chapelle for stained glass that rivals any cathedral, and Montmartre for the hillside village atmosphere the rest of the city lacks. Round it out with a ride on the Paris Metro itself, an experience in its own right, and a stroll through Luxembourg Gardens for the calm between landmarks. Together these cover Paris's monumental, artistic, and everyday sides in one efficient loop.