Mandar Hill, a panoramic landscape of 800-ft-high granite hill, situated 50 km from Bhagalpur city, is associated with the legendary amritmanthana or churning of nectar from the sea. Legend has it that the hill was used by Gods to churn the ocean for procuring nectar. Basuki Nag, a holy snake, offered himself to serve as the rope, and the hill has an impression of the coil on it.