The Kumbh Mela, widely regarded as the largest gathering of pilgrims in the world, is a very important event for Hinduism. Held in at four different areas, a great number of Hindus arrive at the fair to bathe in the holy rivers, a ritual meant to cleans them of sin and bring purity to their lives. The Kumbh Mela is held every three years in a rotation between Haridwar, Allahabad, Nashik, and Ujjain, thus occurring once every twelve years at each destination. The Kumbh Mela in Allahabad is held at Prayaga, the site of the convergence of the three holy rivers of Ganga, Yamuna, and Sarasvati, known as Triveni Sangam. Ardh Kumbh Melas are organised every six years at Haridwar and Allahabad.