Crimson Tide

[Pamplona, July 6. Revelers hold up traditional red neckties during the 'Chupinazo,' the official opening of the San Fermin fiestas in northern Spain]

The fiestas 'Los San Fermines' held since 1591, attracts tens of thousands of foreign visitors each year for nine days of revelry, morning bull-runs and afternoon bullfights. Image via AP.