Be ready to brave mammoth crowds (more than 40 crore people will be attending the festivities over the next few weeks) and the cold (temperatures dip till 7 degrees), but if you overcome that, the Maha Kumbh is a once-in-a-lifetime opportunity.

Hindu devotees from across India flocked to the northern city of Prayagraj yesterday as the world's largest religious festival began. Over the coming 45 days, an estimated 400 million Hindus are expected to come together for Maha Kumbh Mela.

By Saurabh Sharma PRAYAGRAJ, India (Reuters) -Naked Hindu ascetics smeared in holy ash charged into the waters of sacred rivers in India on Tuesday, part of a large crowd of 35 million devotees who took the holy dip on the second day of the Maha Kumbh Mela,