The world is full of fun and crazy people, and these summer festivals are a solid proof. This list features some of the craziest, messiest or most colorful art festivals and national holidays ever, which have gathered millions of people from all around the world.

From mass food fights, such as grape throwing celebration in Australia and a tomato fight in Spain, to an underwater music festival or baby jumping fiesta, and an awe-inspiring light festival there is something for everyone.

International festivals can offer you extraordinary experiences and help you get to know a new country. If you are planning your holidays, be sure to check if the countries you're visiting have any festivals or national days in the schedule. If you know of any festivals that absolutely must be seen to be believed, then add them to this list and vote for your favorites!