San Fermin is accompanied by dancers and street entertainers.
The week-long celebration involves many other traditional and folkloric events.
It is known locally as Sanfermines and is held in honor of Saint Fermin, the co-patron of Navarre.
It has become probably the most internationally renowned fiesta in Spain.
Over 1,000,000 people come to watch this festival.
Photos: AP / GETTY / AFP / EPA / REUTERS
