According to the Wiki -
Kumbh Mela is a mass Hindu pilgrimage in which Hindus gather at the Sangam, meeting place, of the rivers Ganges, Yamuna and mythical Sarasvati, at Prayag where bathing for purification from sin is considered especially auspicious. The festival is billed as the “biggest gathering on Earth”; in 2001 more than 40 million gathered on the busiest of its 55 days.
Disclaimer: Some images below might contain nudity. Viewer’s discretion advised.
Find out more about it on Wikipedia.

Photo by martin prihoda

Photo by Retesh Gondal

Photo by Mark Coughlan

Photo by Aatish Jain

Photo by Ipsito Das

Photo by Shweza

Photo by VividTimes

Photo by jaydorfmanphotography

Photo by Leonid Plotki

Photo by jaydorfmanphotography

Photo by Sylvain Brajeul

Photo by David Ducoin

Photo by Uttar Pradesh Tourist Attractions

Photo by VividTimes

Photo by prabhat kumar verma alld

Photo by prabhat kumar verma alld

Photo by Kumbh Mela 2013,Sangam,Prayag,Allahabad

Photo by © Poras Chaudhary

Photo by PresentMomentRetreat

Photo by carbajo.sergio

Photo by Satyaki Basu

Photo by Sylvain Brajeul

Photo by Thierry Brésillon

Photo by RAMESHA GOWDA

Photo by prabhat kumar verma alld

Photo by Kumbh Mela 2013,Sangam,Prayag,Allahabad

Photo by Its Me Jegan

Photo by jaydorfmanphotography

Photo by Biker Bandit

Photo by Leonid Plotkin