La Tomatina is a huge food fight festival held on the last Wednesday of August each year near Valencia, in Spain.
For exactly one hour during the festival, people get to throw tons and tons of over-ripe tomatoes at each other in the streets!
The whole festival lasts for a week with music, parades, dancing and fireworks.
The night before the tomato throwing, people compete in a paella cooking contest. Paella is a Spanish dish made with rice and seafood.
The festival started back in 1945, but it wasn't an official festival until 1952.
It's thought around 150,000 of rotting tomatoes are thrown. Shopkeepers use massive plastic covers to protect their shops from the mess.
There are so many tomatoes thrown that you can even swim through tomato juice in the streets!