INDIA, Kumbh Mela, the prime Hindu pilgrimage destination with worshippers gathering once every 3 years at one of these four places to take a sacred bath.
In rotation: the banks of the Godavari river in Nasik; the Kshipra river in Ujjain; The River Ganges in Haridwar; the Sangam of Ganges, Yamuna and Saraswati in Allahabad.
It is not only the biggest religious assembly but also recorded as the the largest peaceful human gathering with about 100 million visitors, though pilgrim stampedes in India are not uncommon, with large numbers of fatalities. India Travel Guide
Kumbh Mela, Haridwar, India. Photo by Coupdoeil.