June 31 is not a valid date; please confirm the actual start date and year (examples: June 30–July 4, or July 1–July 5, 2026, etc.) so I can build accurate day-by-day plans and check opening hours.
Let me know your arrival and departure times, preferred pace (relaxed vs packed), interests (museums, food, shopping, architecture, nightlife, kids), and whether you'll use public transit or prefer walking/taxis — this ensures optimal routing and recommendations.