Mahakumbh Mela, one of India's largest religious gatherings, celebrated every 12 years. From its mythological origins to the celestial alignments guiding its locations, explore how this sacred festival draws millions to Prayagraj,

Hindu devotees from across India flocked to the northern city of Prayagraj yesterday as the world's largest religious festival began. Over the coming 45 days, an estimated 400 million Hindus are expected to come together for Maha Kumbh Mela.

Today marks the first day of the Mahakumbh Mela: the largest religious festival in the world. The Hindu festival sees millions of devout followers from all over the world join together in the northern city of Prayagraj,