PHOTOS: Spanish Running of the Bulls in Pamplona, Spain

The festival of San Fermín in the city of Pamplona, Spain, is an ancient annual celebration. See pictures of all the violence and gore for this year's festival.

Revellers run with Jandilla's fighting bulls along the Calle Estafeta during the second day of the San Fermin Running Of The Bulls festival on July 7, 2015 in Pamplona, Spain. (Pablo Blazquez Dominguez/Getty Images)