In the northern Indian city, Prayagraj in Uttar Pradesh is hosting the Mahakumbh Mela, the world’s largest gathering, with millions of devout Hindus arriving from across the globe. Over six weeks, pilgrims take a holy dip at Sangam—the confluence of the Ganges, Yamuna, and mythical Saraswati rivers—believed to cleanse sins. A sprawling 4,000-hectare tent city …
