The city that invented the modern great city. First-visit essentials: pre-booked Eiffel ascent (best photos from Trocadéro at dawn or on the hourly night sparkle), a curated 3-hour Louvre route, the Arc de Triomphe rooftop (best value view in town), and a Seine cruise. Galeries Lafayette handles one-stop shopping with Arabic-speaking tax-refund desks; halal options abound; the métro beats any car.