There is a tradition in the village of Haro, where the residents spend an entire day fighting and soaking each other in red wine. It has been called by many as one of the best events in the Spanish summer, so if you are in the area during the celebration, you have to visit. The only recommendation is to try and not to wear any expensive clothes during your stay.
The village of Haro is located in the region of La Rioja, found in northern Spain. That is the reason why so many haven't heard of the place, as most tourists in Spain usually go to the southern part, where Barcelona, Valencia and most of the beaches are located. The celebration takes place on June 29 every day. The date is also known as the date of patron saint San Pedro.