About 1.5 crore people took a dip in the Ganga and the Sangam on Mauni Amavasya -- the third bathing festival of the ongoing Magh Mela -- in Uttar Pradesh's Prayagraj district on Saturday. A large number of devotees reached the 'mela' area at the Sangam on Friday for Mauni Amavasya and Shani Amavasya.