Venice

Venice welcomes 18 million day-trippers yearly, 30% more than Rome’s 9.2 million overnight stays, yet its 118 islands restrict peak crowds to 0.3 sq km—a density 40% higher than Florence’s historic core. A 2025 preservation rule caps cruise ships at 200 daily, cutting noise pollution by 60% compared to 2019 levels. Gondola rides cost €80 an hour, making them 25% cheaper than a guided Colosseum tour.