Oktoberfest (Munich, Germany)

Oktoberfest claims the top spot for its unrivaled scale: 6 million visitors consume 7 million liters across 14 tents over 16 days, a tradition since 1810 that sets the global standard for beer festivals. The 4,000 beers sampled at Great American Beer Festival may offer variety, but no single event matches Oktoberfest's sheer throughput of 437,500 liters per day.