Avoid these "hot" summer destinations

Even travel advisors won't let their clients book these overcrowded cities. Here's where they're going instead.

Do I really need to show you pictures of Dubrovnik when there's a cruise ship in town, or of the Trevi Fountain in Rome on a hot day, to prove travel has never been as crowded as it is this summer?

Probably not. A recent survey by Global Rescue found that 73 percent of travelers are worried about overtourism, and more than half are actively avoiding popu…