This is the Paris day you need if it's your first time. Not because it's easy or obvious, but because these places earned their reputation. Montmartre at dawn before the tour groups arrive. Notre-Dame's island in the middle of the day when the light hits the stone just right. The Seine at sunset with a glass of wine in your hand. The Eiffel Tower after dark when it finally makes sense. We're not avoiding the famous stuff. We're doing it correctly. The route is a clean north-to-south line across the Right Bank, the islands, and the 7th arrondissement. You'll walk about 8 kilometers total, but spread across the whole day with plenty of sit-down time. Budget around €100-120 for food and drinks. Metro tickets are €2.10 each or €17.35 for a day pass if you want flexibility. Museum entry is separate. Sainte-Chapelle is €13, the Eiffel Tower summit is €29.40 if you book ahead. We'll tell you when it's worth it and when it's not. By 8:30 pm you'll have seen the core of the city in one coherent day. Not rushed, not random. You'll understand why Paris looks the way it does, why people keep coming back, and you'll have enough in your camera roll to prove you were actually here. This isn't a greatest-hits shuffle. It's the first day that makes the rest of your trip make sense.