The Maha Kumbh Mela, the world’s largest gathering, has officially started in Prayagraj, northern India, with millions of Hindus arriving to bathe in the holy Ganga River. Over the course of six weeks, more than 400 million people are expected to attend the festival, which blends religion, spirituality, tourism, and the challenge of crowd management. The event is a vital part of India’s cultural and religious heritage, attracting worshippers from around the world.