This unique group of men works around the year, braving the bone-chilling cold waters even during winters, to dive into the river and retrieve coins from the bottom. The same coins that are thrown into the waters by passengers of boats crossing the river, as an offering to the River Goddess.

The police will sometimes utilize the divers to help fish bodies out of the river.

For some types of newer coins, they are able to use magnets attached to strings, as well as other clever tricks.

Just like the Ganges, the Yamuna too is highly venerated in Hinduism and worshipped as goddess Yamuna, throughout its course.

In Hindu mythology, she is the daughter of Sun God, Surya, and sister of Yama, the God of Death, hence also known as Yami and according to popular legends, bathing in its sacred waters frees one from the torments of death.

Via Oddity Central with more videos and the full article. Also, historical context from Wikipedia.