Сурва (Surva Festival) is Bulgaria’s most famous international festival of masquerade games, held every January in the town of Pernik. Recognized by UNESCO as part of the world’s intangible cultural heritage, the event gathers thousands of kukeri—costumed dancers wearing elaborate masks and bells—who parade through the streets to chase away evil spirits and welcome the coming of spring. Alongside the traditional rituals, visitors enjoy folk music, crafts, and a vibrant carnival atmosphere that celebrates both ancient Thracian customs and modern creativity. It’s the largest and most spectacular masquerade event in the Balkans.