Asthi Visarjan is a Hindu ritual that involves the immersion of the ashes (asthis) of a deceased person into a holy river. In Prayagraj, this ritual holds significant importance due to the confluence (Sangam) of three sacred rivers: the Ganges, Yamuna, and the invisible Saraswati. This ritual is helps to provide moksha or liberation to the departed soul, allowing it to merge with the divine.