The Fiestas del Pilar in Zaragoza, Spain, are a major 10-day celebration in October honoring the Virgen del Pilar, featuring over 500 cultural events, including the renowned Feria Taurina bullfighting festival. With millions of visitors, the festivities fill the city with music, color, and tradition. Key highlights include the Flower Offering, the Rosario de Cristal procession, and the spectacular fireworks finale.