The key feature of the annual La Tomatina festival held in Spain is the massive tomato fight. Participants gather in the town of Buñol, where they engage in a playful battle using ripe tomatoes, resulting in a district spectacle of red pulp and laughter. This event started as a local tradition and has since drawn international attention, turning into a fun celebration of chaos and community. La Tomatina fosters a spirit of camaraderie and joy, as people from various backgrounds come together to enjoy this unique and often messy experience.