Millions of devotees, including Sadhus of 13 akharas, participated in the first 'Amrit Snan' of the Maha Kumbh in UP's Prayagraj on the occasion of 'Makar Sankranti' on Tuesday. The devotees took a dip at the Triveni Sangam, which is believed to be a sacred confluence of rivers Ganga, Yamuna, and mystical Saraswati. Maha Kumbh started on Monday.