Naga sadhus on the banks of river Ganga during Ardh Kumbh Mela in 2007

Naga sadhus dry their hair after a holy bath in the river Ganga during Ardh Kumbh at Prayaga in 2007. More than 70 million people visited Ardh Kumbh Mela at Prayag in 2007. Kumbh Mela is a mass Hindu pilgrimage of faith in which Hindus gather to bathe in a sacred river. It is considered to be largest peaceful gathering in the world. 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