It’s late evening in the city of Prayagraj and the roadside vendors selling snacks are packing up their wares to shut for the night.

Nearly 15 million Hindus, six times the number expected, took a dip in freezing waters seeking absolution of their sins on Monday, the first day of India's festival that could draw the world's largest single gathering of humanity.

The Maha Kumbh Mela 2025 is in full swing, and one of its most fascinating aspects is the presence of the Naga Sadhus. Known for their mysterious lives and spiritual strength, these ascetics are an integral part of India’s grandest religious gathering.