Hindu holy men and devotees take a ceremonial dip in Sangam, the confluence of Ganges, Yamuna and mythical Saraswati rivers, for Shahi Snan or "royal bath" as part of the Kumbh Mela festival in Prayagraj. Organisers are expecting some 400 million people to attend the Kumbh Mela festival in northern India -- a six-week-long celebration of prayer and bathing that began before dawn on Monday. IMAGES AND SOUNDBITES