Kumbh Mela
"Kumbh Mela is a mass Hindu pilgrimage of faith in which Hindus gather to bathe in a sacred river. It is considered to be the largest peaceful gathering in the world where around 100 million people were expected to visit during the Maha Kumbh Mela in 2013 in Allahabad. It is held every third year at one of the four places by rotation: Haridwar, Allahabad (Prayaga), Nashik and Ujjain. Thus the Kumbh Mela is held at each of these four places every twelfth year. Ardha ("Half") Kumbh Mela is held at only two places, Haridwar and Allahabad, every sixth year. The rivers at these five places are: the Ganges (Ganga) at Haridwar, the confluence (Sangam) of the Ganges and the Yamuna and the mythical Saraswati at Allahabad, the Godawari at Nashik, the Shipra at Ujjain and the kausiki at Chataradham." wikipedia
