India's Kumbh Mela festival

An estimated 30 million devotees were expected to take a dip at the

Sangam, the confluence of three rivers — the Ganges, the Yamuna and the

mythical Saraswati — one of the holiest bathing days of the Kumbh Mela, or Pitcher Festival. The festival lasts 55 days and is one of the world's largest religious gatherings.

A Hindu devotee prays after a holy dip at 'Sangam', the confluence of Hindu holy rivers Ganges, Yamuna and the mythical Saraswati, during the Maha Kumbh festival at Allahabad, India, Sunday, Feb. 10, 2013. Led by heads of monasteries arriving on chariots and ash-smeared naked ascetics, millions of devout Hindus plunged into the frigid waters of the holy Ganges River in India on Sunday in a ritual that they believe will wash away their sins. Sunday was the third of six auspicious bathing days during the Kumbh Mela, or Pitcher Festival, which lasts 55 days and is one of the world's largest religious gatherings. (AP Photo /Rajesh Kumar Singh)

A Hindu devotee prays after a holy dip at 'Sangam', the confluence of Hindu holy rivers Ganges, Yamuna and the mythical Saraswati, during the Maha Kumbh festival at Allahabad, India, Sunday, Feb. 10, 2013. Led by heads of monasteries arriving on chariots and ash-smeared naked ascetics, millions of devout Hindus plunged into the frigid waters of the holy Ganges River in India on Sunday in a ritual that they believe will wash away their sins. Sunday was the third of six auspicious bathing days during the Kumbh Mela, or Pitcher Festival, which lasts 55 days and is one of the world's largest religious gatherings. (AP Photo /Rajesh Kumar Singh)

A "Naga" sadhu or Hindu naked holy man takes a dip at "Sangam," the confluence of Hindu holy rivers Ganges, Yamuna and the mythical Saraswati, during the Maha Kumbh festival at Allahabad, India, Sunday, Feb. 10, 2013. Millions of devout Hindus and thousands of Hindu holy men are expected to take a dip at Sangam on Sunday, the most auspicious day according to the alignment of stars, for the entire duration of Maha Kumbh festival, which lasts for 55 days. (AP Photo/ Saurabh Das)

Hindu devotees walk across pontoon bridges to take a holy dip at Sangam, the confluence of the Ganges, Yamuna and mythical Saraswati River, during the Maha Kumbh festival, in Allahabad, India , Sunday, Feb. 10, 2013. Millions of devout Hindus and thousands of Hindu holy men are expected to take a dip at Sangam on Sunday, the most auspicious day according to the alignment of stars, for the entire duration of Maha Kumbh festival, which lasts for 55 days. (AP Photo /Manish Swarup)

Hindu devotees walk across pontoon bridges to take a holy dip at Sangam, the confluence of the Ganges, Yamuna and mythical Saraswati River, during the Maha Kumbh festival, in Allahabad, India , Sunday, Feb. 10, 2013. Millions of devout Hindus and thousands of Hindu holy men are expected to take a dip at Sangam on Sunday, the most auspicious day according to the alignment of stars, for the entire duration of Maha Kumbh festival, which lasts for 55 days. (AP Photo /Manish Swarup)

An Indian Hindu holy man, or Naga Sadhu, swings his head as he bathes at Sangam, the confluence of the rivers Ganges, Yamuna and mythical Saraswati, during the royal bath on Makar Sankranti at the start of the Maha Kumbh Mela in Allahabad, India, Monday, Jan. 14, 2013. Millions of Hindu pilgrims are expected to take part in the large religious congregation that lasts more than 50 days on the banks of Sangam during the Maha Kumbh Mela in January 2013, which falls every 12th year. (AP Photo/Kevin Frayer)