Dubrovnik Old Town, Croatia

Dubrovnik Old Town receives 8,000 cruise passengers daily during summer, transforming its limestone streets into a gridlock rivaling the Taj Mahal's queue. Crowd-counting cameras installed in 2019 revealed peak densities of 40 people per square meter, triple the comfortable limit. The Game of Thrones effect added 30% more visitors than pre-2011 levels, and local authorities now cap daily cruise arrivals at 4,000. This proactive measure outpaces the reactive permit system at Cinque Terre, where train reservations can't prevent bottlenecks.