Hindu devotees on Monday took a 'holy bath' on the first day of the Kumbh Mela festival at Sangam, the confluence of the holy rivers Ganges, Yamuna, and Saraswati, in the northern Indian state of Uttar Pradesh.

Millions of Hindu devotees and mystics have gathered in the northern Indian city of Prayagraj for the Maha Kumbh festival, which is the largest religious congregation on earth

Millions of Hindu devotees, mystics and holy men and women have flocked to the northern Indian city of Prayagraj on Monday to kickstart the world's largest religious gathering. The Maha Kumbh festival is expected to include at least 400 million people—more than the population of the United States—according to officials.