Overtourism and summer heat have increased the allure of off-season travel in Europe, and the cruise industry is taking note with more winter itineraries. Added bonus: cheaper fares. Travel and Vacations, Winter (Season), Cruises, Mediterranean Sea Overtourism and summer heat have increased the allure of off-season travel in Europe, and the cruise industry is taking note with more winter itineraries. Added bonus: cheaper fares. NYT > Business