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The economics of India's Kumbh Mela

20 January 2013 Last updated at 16:26 GMT

Billed as the biggest gathering on earth, India's Kumbh Mela is an overwhelming spectacle of religion and spirituality.

Millions of Hindus have flocked to Allahabad believing that a dip in the waters at Sangam - where the Ganges and Yamuna rivers meet.

The festival, which takes place on this scale only once every 12 years, could give a huge lift for the local economy, but it also presents enormous logistical challenges, as Yogita Limaye reports.