The Kumbh Mela is held every three years. It switches between four different locations on banks of different rivers. These are : Haridwar (river Ganga), Prayag (Triveni sangam of Yamuna, Ganga and Saraswati), Ujjain (river Kshipra), and Nasik (river Godavari). The mela returns to each location after a span of 12 years