Oruro Carnival (Bolivia)

Oruro Carnival boasts the most intense 20-hour procession on this list, with 28,000 dancers performing the Diablada, a dramatic reenactment of good versus evil. As a UNESCO Masterpiece, it attracts over 400,000 spectators annually, offering a richer cultural density than the month-long Tenerife Carnival. An estimated 98% of performers train year-round, highlighting unmatched community commitment.