The San Fermín festival, featuring a daily running of the bulls, is one of Spain’s best-known celebrations, drawing hundreds of thousands of visitors to the northern city of Pamplona each year. The festival also features parades, music, religious ceremonies and round-the-clock street festivities. It gained worldwide fame after Ernest Hemingway featured it in his 1926 novel “The Sun Also Rises,” which marks its 100th anniversary this year.