Amol Rajan heads to India on a pilgrimage to the largest religious festival in history, the Kumbh Mela.
The Uttar Pradesh government says 37 people were killed in the Kumbh Mela crush, but the BBC has verified at least 82 deaths.
A photojournalist narrates his experience of capturing the world's biggest religious gathering for decades.
A report found alarming levels of sewage and faecal contamination in rivers where millions are bathing.
Does the world's largest religious gathering ever go to sleep? The BBC filmed through the night to find out.
At least 30 people died and several were injured in a crush at the religious festival in India this week.
Pilgrims rushing to take part in ritual bathing trampled over people on the banks of the Ganges.
The festival draws millions of Hindu pilgrims and spiritual seekers from India and across the globe.
Vikas Pandey and Samira Hussain explain how the chaos unfolded in northern India.
