Think of a festival like a giant themed party. It's an event where thousands of like-minded travelers get together to celebrate the thing they love most — whether it's movies or contemporary art, electronic music or classical theater, regional cuisine or beer. Festivals often provide an excuse for visiting a destination during peak season, when it's likely teeming with an irresistible mix of locals, visiting performers, and curious tourists. Travel + Leisure highlights the most buzzworthy gatherings in dozens of countries to create the ultimate guide to the world's best festivals and fairs.