Revelers from around the world arrive to Pamplona every year to take part in some of the nine days of the running of the bulls.

The festival is a symbol of Spanish culture that attracts thousands of tourists to watch the bull runs despite heavy condemnation from animal rights groups.

The festival, a heady mix of drinking, dancing, late nights and bullfights, made famous by Ernest Hemingway in his novel "The Sun Also Rises", runs for nine days until July 14.